HVAC Licensing Requirements by State

Quickly compare HVAC licensing requirements across all 50 states and find state-specific guides covering licenses, costs, timelines, reciprocity, and more.

About this tool

This tool helps clarify where HVAC licensing is handled statewide, locally, or through specialized trade and contractor requirements.

Explore by State

  • State license required
  • Local license only
  • No license required

Click a state to view requirements

View detailed information about license types, qualifications, exams, fees, and renewals.

States at a Glance

Quickly see which states require an HVAC license.

State License Required Estimated Cost Timeline Renewal Cycle Avg. Tech Salary
Alabama Yes $500 - $1,200 1 - 2 Months Yearly $52,440 View Guide for Alabama
Alaska Yes $600 - $1,500 4 - 8 Weeks 2 Years $80,940 View Guide for Alaska
Arizona Yes $600 - $1,400 2 - 6 weeks 2 Years $57,420 View Guide for Arizona
Arkansas Yes $300 - $1,200 4 - 12 weeks Yearly $48,607 View Guide for Arkansas
California Yes $1,200 - $2,500 3 - 6 Months 2 Years $70,050 View Guide for California

Understanding HVAC Licensing Across the U.S.

HVAC offers strong earning potential, steady demand, and multiple paths to build a long-term career. Getting licensed, however, is not the same everywhere. There is no single national HVAC license or universal process. Each state sets its own rules, and in some places licensing is handled primarily by cities, counties, or other local authorities.

  • License types vary States may issue broad HVAC licenses or regulate specific trade specialties.
  • Requirements differ Experience, exams, fees, insurance, and renewal rules vary by state.
  • State and local rules Some states license statewide, while others rely on local jurisdictions.
  • Your role matters Requirements may differ for technicians, contractors, qualifiers, and businesses.

Use the state-by-state summaries below to identify the primary HVAC licensing requirements and governing authorities where you plan to work. For current fees, forms, exams, renewal requirements, and local rules, always confirm the details with the appropriate licensing authority before applying.

The federal requirements that follow you everywhere

State licensing is only one part of becoming an HVAC professional. For stationary air-conditioning and refrigeration work, the key federal credential is the EPA Section 608 Technician Certification. The EPA requires technicians who maintain, service, repair, or dispose of equipment that could release refrigerants to be certified. The credential does not expire.

The four main credential types are:

  • Type I — small appliances
  • Type II — high- and very-high-pressure appliances
  • Type III — low-pressure appliances
  • Universal — all covered stationary equipment

Apprentices can work before certification only when the federal supervision conditions are met. State law may also go beyond the federal baseline, so a state can require its own license, registration, permit, or supervision even when an EPA certification is already in hand.

The Typical Path: From Helper to Licensed HVAC Contractor

The details vary by state, but most licensing systems follow a recognizable progression. Keeping that sequence in mind makes the state-specific requirements below much easier to follow.

1. Decide: Do You Want to Work or Contract?

This is one of the most important distinctions to understand. A technician works for a licensed contractor and typically performs the installations, repairs, and maintenance in the field. A contractor, by contrast, generally authorizes the business to advertise, bid, enter contracts, pull permits, and employ or supervise workers. The two roles and credentials are not interchangeable.

2. Identify the State and the Job Location

Statewide licensing, local licensing, and permitting requirements can overlap. In states where licensing is handled locally, identify every city and county where the business will operate before choosing a credential. One license may not cover every jurisdiction where you plan to work.

3. Build Qualifying Experience

Common routes include an apprenticeship, trade school followed by field experience, supervised on-the-job training, military experience, or a combination recognized by the licensing authority. Most states want evidence that you have accumulated the required experience before you can work independently.

4. Pass the Required Exams and Earn Certifications

State exams commonly cover trade knowledge, code, and business law. The EPA Section 608 Certification is separate and applies federally to covered refrigerant work. Plan to take both.

5. Establish the Business Side

Contractor licensing can involve a qualifying individual, entity registration, a bond, general liability insurance, workers’ compensation, financial responsibility, and a permanent place of business. In other words, It’s not just about knowing how to fix a furnace, you need to run a business too.

6. Apply, Pass, and Stay Compliant

Once you’re licensed, the work isn’t finished. Keep track of renewal deadlines, continuing education, bond and insurance renewals, permit requirements, and any changes involving the business or qualifying individual. Building a compliance system early can make those ongoing obligations much easier to manage down the line.

HVAC licensing requirements for all states

Every state takes a slightly different approach to HVAC licensing, so the details matter. The sections that follow break down what you need to know in each state, including who oversees licensing, which HVAC credentials are available, how the licensing process generally works, and any state-specific requirements or distinctions that could affect the work you plan to do.

Alabama

License model: State licensing required for HVAC/refrigeration contractors and certain related work.

Official licensing authority or regulator: Alabama Board of Heating, Air Conditioning & Refrigeration Contractors

Alabama uses a state-level licensing system for heating, air conditioning, and refrigeration work. The state Board offers three main credentials, and the right starting point depends on whether you’re entering the trade under supervision or preparing to operate as a contractor.

HVAC-related license or certification types:

  • Apprentice Registration – Your entry point to learn the trade under supervision.
  • Certified Heating and Air Conditioning Contractor – Authorizes you to contract independently, pull permits, and advertise HVAC services.
  • Certified Refrigeration Contractor – The same business-facing authorization, but specifically for refrigeration work.

What the licensing path generally looks like:

If you’re new to the trade in Alabama, start with the Apprentice Registration. It lets you work under a licensed contractor while you build experience. After two years as an apprentice and proof of at least 3,000 hours (roughly 18 months) of supervised work experience, you become eligible to sit for the contractor exams.

From there, choose the credential that matches your scope: Certified Heating and Air Conditioning Contractor or Certified Refrigeration Contractor. The two paths are similar. You’ll qualify through experience or education, pass the Board’s prelicensure exam (currently $150 per exam, or $300 for both), submit the application with the required fees (around $220 for initial certification), provide a $20,000 performance bond, and get the required insurance in place. Once licensed, you’ll renew annually and stay current with any continuing education requirements.

For a more detailed breakdown, see our Alabama HVAC License Requirements guide.

Alaska

License model: State mechanical-administrator licensing plus business/contractor licensing.

Official licensing authority or regulator: Alaska Division of Corporations, Business and Professional Licensing

Alaska approaches HVAC licensing through mechanical administrator credentials rather than a traditional statewide technician license. The Mechanical Administrator is the individual who qualifies a business to perform work in a specific mechanical category. If you want to own an HVAC business, you’ll need to be a licensed contractor and hold a mechanical administrator license in the applicable category.

HVAC-related license or certification types:

  • Unlimited HVAC/Sheet Metal (UHVCS) – The broadest credential; covers commercial and residential HVAC systems of any size.
  • Residential HVAC (RHVC) – Strictly for single-family homes and duplexes up to three stories.
  • Unlimited Refrigeration (UR) – Covers refrigeration and air conditioning equipment without restriction on thermal capacity or refrigerant type.
  • Heating, Cooling & Process Piping (HCPP) – Covers hydronic systems, boilers, and process piping.
  • Mechanical Systems Temperature Control (CNTL) – Focuses on building automation, DDC systems, and pneumatic controls.

What the licensing path generally looks like:

Your journey starts with choosing the category that matches your scope of work, and each has its own experience requirements. You’ll document your journeyman-level experience (or, in some cases, management experience or an engineering degree). Once your hours are logged, submit your application to the Division, pay the combined application and license fee (around $350), and schedule your PSI exam for that specific category. You need to score at least 70 percent within the 12 months before your application.

After you pass, the administrator license is attached to a specific licensed contractor; you can’t hold it on its own. You’re also limited to qualifying work for one contractor at a time, unless you’re in a very small community. If you change employers, you have 15 days to notify the department.

For a more detailed breakdown, see our Alaska HVAC License Requirements guide.

Arizona

License model: State contractor licensing required for HVAC work valued over $1,000, with local journeyman licensing in some cities.

Official licensing authority or regulator: Arizona Registrar of Contractors (ROC)

Arizona combines state contractor licensing with local requirements. The Registrar of Contractors handles the state contractor license, while cities and counties may add their own permit or registration rules. The state does not issue a journeyman license, although some cities, such as Phoenix, do. For independent contracting, you’ll need a contractor license; employees may instead be subject to local requirements.

HVAC-related license or certification types:

  • C-39: Specialty Commercial Air Conditioning and Refrigeration – For commercial air conditioning and refrigeration work.
  • R-39: Specialty Residential Air Conditioning and Refrigeration – For residential air conditioning and refrigeration work, including evaporative cooling and heating systems.
  • CR-39: Specialty Dual Air Conditioning and Refrigeration: Authorizes both residential and commercial work under a single license.
  • C-79: Commercial Air Conditioning and Refrigeration Including Solar – Commercial air conditioning and refrigeration, including solar.
  • R-79: Residential Air Conditioning and Refrigeration Including Solar – Residential air conditioning and refrigeration, including solar.

What the licensing path generally looks like:

Arizona’s licensing path begins with qualifying experience. You need at least four years of verifiable journey-level or supervisory experience in the specific classification you’re applying for, within the past ten years. Up to two years can be satisfied through technical training or an approved apprenticeship.

With the experience requirement met, you’ll take two exams: the Arizona Statutes and Rules Exam (SRE) and a trade-specific exam for your chosen classification. PSI administers the trade exam, and you need a score of 70% or higher.

The business portion comes next: submit your application to the ROC, provide proof of a surety bond (amounts vary by classification and gross volume, $4,250–$7,500 for residential and $2,500–$15,000 for commercial), secure general liability insurance, and register your business entity.

You’ll also need to pass a background check. The total initial cost is around $440, and licenses renew every two years. Arizona does not have a state-mandated continuing education requirement for renewal, but local cities or counties may have their own rules.

The key distinction is who the state licenses: contractors, not technicians. If you’re working as an employee, your local jurisdiction will determine whether a journeyman license is required.

For a more detailed breakdown, see our Arizona HVAC License Requirements guide.

Arkansas

License model: State contractor licensing required for all HVACR work, with multiple class levels based on system capacity and scope.

Official licensing authority or regulator: Arkansas Heating, Ventilation, Air Conditioning and Refrigeration (HVACR) Licensing Board

Arkansas uses a class-based HVACR licensing system. Rather than relying on one broad contractor credential, the state assigns license classes based on the type and capacity of the work you’re authorized to perform. The HVACR Licensing Board, within the Department of Labor and Licensing, issues the credentials.

HVAC-related license or certification types:

  • Class A – Unlimited HVACR work without limitation to BTUH or horsepower capacities.
  • Class B – HVACR work on systems up to 25 tons cooling capacity or 1,000,000 BTUH heating input per unit, and refrigeration systems of 15 HP or less.
  • Class D – Sheetmetal ductwork for HVACR systems only; no installation or service of HVAC equipment.
  • Class E – Refrigeration work only, without limitation on horsepower; no heating or air conditioning for human comfort.
  • Class L – “Lifetime” license for service and maintenance only on systems up to 15 tons cooling or 1,000,000 BTUH heating; no installation or replacement.

What the licensing path generally looks like:

First, decide which class matches the work you want to do in Arkansas – this step is critical because your license won’t authorize work outside its scope. You must be at least 18 years old. Then, document at least two years of experience as an HVACR contractor or employee of an HVACR contractor. The Board may substitute HVACR-related educational training for some experience, but only if the training is Board-approved.

If you’re not currently licensed in a reciprocal state, you’ll need to pass a Board-approved examination covering trade knowledge, codes, and relevant laws. Once you pass, submit your application to the Department of Labor and Licensing, pay the required fee (around $150 for most classes), and provide proof of general liability insurance.

The Board may also require a financial statement demonstrating minimum net worth. Arkansas does have reciprocity provisions, but they’re not automatic. So, the Board may approve an applicant from another state if that state’s laws are “substantially similar” and you hold a license in good standing.

Also, be aware that Class D and E are limited-scope licenses (for example, a Class E licensee cannot install heating or air conditioning equipment for human comfort), so choose your class carefully. Finally, Arkansas requires a license for HVAC work regardless of project value (there’s no dollar threshold that exempts you).

For a more detailed breakdown, see our Arkansas HVAC License Requirements guide.

California

License model: State contractor licensing required for HVAC work over $500 (with a $1,000 threshold for most contracting activity), overseen by the Contractors State License Board (CSLB).

Official licensing authority or regulator: California Contractors State License Board (CSLB)

California uses a state contractor licensing system for HVAC projects valued at more than $500. The Contractors State License Board (CSLB) offers two primary HVAC-related classifications, so the classification you select needs to match the work you plan to bid and perform.

California does not issue a statewide journeyman HVAC license for individual workers. The contractor license applies to the business and its qualifying individual, while employees generally do not need a separate state-issued HVAC license to perform work under that contractor’s license.

HVAC-related license or certification types:

  • C-20: Warm-Air Heating, Ventilating and Air-Conditioning Contractor – The primary HVAC contractor license. Covers fabrication, installation, maintenance, service, and repair of warm-air heating, ventilating, and air-conditioning systems, including ductwork, registers, flues, thermostats, humidity controls, air filters, and related solar-energy HVAC systems.
  • C-38: Refrigeration Contractor – Covers construction, installation, maintenance, service, and repair of refrigerators, refrigerated rooms, insulated refrigerated spaces, and air-conditioning units where the controlled temperature is below 50°F. This includes commercial refrigeration, walk-in coolers, freezers, and process cooling systems.

What the licensing path generally looks like:

In California, the process starts with experience. You’ll need at least four years of journey-level experience in the HVAC or refrigeration trade within the ten years immediately before you apply for an HVAC license. Up to three years can come from technical training or an approved apprenticeship, but at least one year must be practical, on-the-job work.

Once the experience requirement is met, you’ll take two state exams: the trade exam for your chosen classification (C-20 or C-38) and the Law and Business exam, both administered by PSI. The application fee is currently $450. After you pass, you’ll pay an initial license fee of $200 for a sole owner or $350 for a non-sole owner. You’ll also need to post a $25,000 contractor’s bond with the CSLB, secure workers’ compensation insurance (required even if you have no employees), complete fingerprinting for a background check, and show at least $2,500 in working capital. The total cost typically falls between $799 and $949, and licenses are valid for two years.

C-20 and C-38 are separate classifications. C-20 covers comfort heating and cooling, while C-38 covers refrigeration systems. If your work crosses both areas, you may need to hold both.

For a more detailed breakdown, see our California HVAC License Requirements guide.

Colorado

License model: No statewide HVAC license; licensing and permitting are handled at the city and county level.

Official licensing authority or regulator: Local city/county building departments (e.g., Denver Community Planning and Development, Pikes Peak Regional Building Department)

Colorado is one of the few states that does not issue a statewide HVAC contractor license. Instead, regulation happens at the local level, meaning the requirements to work in Denver can be completely different from those in Colorado Springs or Aurora. If you’re planning to work across multiple jurisdictions, you’ll likely need to get licensed in each one individually.

HVAC-related license or certification types:

  • Mechanical/HVAC Contractor License (Denver) – Requires a Supervisor Certificate and passing ICC exams.
  • Class M – Mechanical Contractor (various jurisdictions) – Authorizes HVAC services.
  • Class D11 – HVAC Contractor (Littleton): Requires proof of ICC testing or equivalent license.
  • Mechanical Contractor A, B, C (Pikes Peak Region) – Commercial, residential, and refrigeration classifications.

What the licensing path generally looks like:

Because there’s no single state process in Colorado, your first step is figuring out where you’ll be working. Each city or county has its own application, exam, and fee structure, so check with the local building department before you do anything else.

In most jurisdictions, you’ll need to document qualifying field experience (typically around four years) and pass one or more trade exams. Many areas require ICC certification or a state-administered exam with a passing score of 75%. You’ll also need general liability insurance and, in some cases, a surety bond.

If your work involves electrical wiring or gas piping, you may need additional state credentials from Colorado DORA, which licenses electricians and plumbers. There’s no statewide reciprocity, so out-of-state contractors must get licensed by each local jurisdiction where they plan to work.

Connecticut

License model: State licensing required at every level (apprentice, journeyperson, and contractor) with both unlimited and limited classifications.

Official licensing authority or regulator: Connecticut Department of Consumer Protection (DCP)

Connecticut has one of the most comprehensive HVAC licensing systems in the country, requiring licensure at every career stage from apprentice through contractor. The DCP, working with the Heating, Piping, Cooling, and Sheet Metal Examining Board, oversees all credentials.

HVAC-related license or certification types:

  • S-1 Unlimited Heating, Piping, and Cooling Contractor – Allows unlimited HVAC work, pulling permits, and running a business; requires two years as an S-2.
  • S-2 Unlimited Heating, Piping, and Cooling Journeyperson – Allows unlimited HVAC work while employed by a licensed contractor.
  • D-1 Limited Warm Air, Air Conditioning and Refrigeration Contractor – Business-owner version of the D-2.
  • D-2 Limited Warm Air, Air Conditioning and Refrigeration Journeyperson – Restricted to residential and light commercial systems.
  • B-1 Limited Gas and Oil Burner Contractor – Covers installation, service, and repair of gas and oil burners. Required for independent contractors focusing on combustion burners and related equipment.
  • B-2 Limited Gas and Oil Burner Journeyperson – Covers installation and service of gas or oil burners for domestic and light commercial work. Allows a technician to work as an employee under a licensed contractor.

What the licensing path generally looks like:

Your path to HVAC licensure in Connecticut begins with becoming a registered apprentice with the DCP and the Connecticut Office of Apprenticeship Training. You’ll need to complete a four-year program with 8,000 hours of on-the-job training and 720 hours of classroom instruction. From there, you can test for a journeyperson license – either the unlimited S-2 or a limited license like the D-2, depending on your career goals.

The exams are administered by PSI, and you’ll need a score of at least 70%. For those focusing on burners, the B-2 and B-1 paths follow the same structure, though the scope of work is more specialized.

After holding your journeyperson license for two years, you become eligible to sit for the contractor exam (S-1, D-1, or B-1), which adds a Business & Law component to the testing.

Contractors must also carry insurance and register their business with the state. All licenses expire annually on August 31, with renewal fees ranging from $120 to $150 depending on the license type. Connecticut does have reciprocity provisions, but only for licenses from states with very similar requirements.

For a more detailed breakdown, see our Connecticut HVAC License Requirements guide.

Delaware

License model: State licensing required at multiple levels (apprentice, journeyman, master, and contractor) with both unrestricted and restricted master classifications.

Official licensing authority or regulator: Delaware Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners

Delaware regulates HVACR professionals through the Division of Professional Regulation. The state requires licensure at every career stage, from apprentice through master. Importantly, Delaware’s state license is recognized by all counties and municipalities without additional local requirements – a significant advantage compared to states with fragmented local oversight.

HVAC-related license or certification types:

  • Master HVACR – Allows unlimited design, installation, service, and repair of HVACR systems, including gas piping.
  • Master HVACR Restricted – Limited to a single specialty: Heating (Forced Air Systems, Ventilation, and Gas Piping), Heating (Hydronic Systems and Gas Piping), Commercial Hood Systems, Refrigeration, Air Conditioning, or Gas Piping.

What the licensing path generally looks like:

To qualify for a Master HVACR license in Delaware, you’ll need to complete a four-year apprenticeship with at least 144 hours of education per year, or alternatively, work seven years under supervision and pass the Apprentice By-Pass Exam.

From there, you can qualify for a master license one of two ways: complete a journeyman’s certificate and then perform HVACR services for two years under a master licensee, or perform HVACR services for seven years under a master licensee and pass the apprenticeship equivalency test. If you’re pursuing a Restricted Master HVACR license, you’ll only need to pass the exam section relevant to your chosen specialty.

All applications are submitted through Delaware’s online DELPROS system. If you hold a current license of the same type in another state, you may apply by reciprocity. Keep in mind that if your work involves plumbing beyond gas piping, you’ll need a separate Master Plumber license.

For a more detailed breakdown, see our Delaware HVAC License Requirements guide.

Florida

License model: State contractor licensing required for all HVAC work, with Class A (unlimited) and Class B (limited) classifications, each available as Certified (statewide) or Registered (county-specific).

Official licensing authority or regulator: Florida Construction Industry Licensing Board (CILB) within the Department of Business and Professional Regulation (DBPR)

Florida requires a state-issued contractor license for any HVAC work. The Construction Industry Licensing Board oversees licensing, offering licenses in two capacity tiers (Class A and Class B) each with Certified (statewide) or Registered (county-specific) options.

HVAC-related license or certification types:

  • Class A Air Conditioning Contractor – Allows unlimited work on any size HVAC system (commercial, residential, and industrial).
  • Class B Air Conditioning Contractor – Limited to cooling systems of 25 tons or less and heating systems of 500,000 BTU or less, primarily residential and light commercial.
  • Mechanical Contractor – Covers the installation, maintenance, repair, alteration, and design of unlimited HVAC, refrigeration, boiler, pressure vessel, gas piping, and related mechanical systems.

What the licensing path generally looks like:

In order to get licensed in Florida, you must first be at least 18 years old. You’ll need to document at least four years of HVAC experience at the journeyman level or higher, with at least one year in a supervisory role. 

Experience must be verified by employer affidavits. Once your experience is documented, you’ll need to pass two state exams administered by Pearson VUE: a Business and Finance exam and a Trade Knowledge exam covering HVAC systems, refrigerants, and code. 

After passing, submit your application to the DBPR with proof of insurance (minimum general liability coverage of $300,000), and workers’ compensation for any employees. 

You must obtain your license within four years of receiving your exam score. Once licensed, you’ll need to complete 14 hours of continuing education every two years. Out-of-state licensees who haven’t passed Florida’s exam can apply for licensure by endorsement.

For a more detailed breakdown, see our Florida HVAC License Requirements guide.

Georgia

License model: State contractor licensing required for all conditioned air (HVAC) work, with restricted and unrestricted classifications.

Official licensing authority or regulator: Georgia State Board of Conditioned Air Contractors (under the Secretary of State)

Georgia doesn’t mess around when it comes to HVAC licensing, the state requires a Conditioned Air Contractor license for any heating, cooling, or ventilation work, and you won’t find a separate journeyman license here. The Board offers two classifications, and picking the right one from the start is key because your license scope is tied directly to system capacity.

HVAC-related license or certification types:

  • Class I Conditioned Air Contractor (Restricted) – Covers systems not exceeding 175,000 BTU of heating and 60,000 BTU of cooling (sufficient for virtually all residential work).
  • Class II Conditioned Air Contractor (Non-restricted) – The unrestricted license with no system size limitations; required for commercial work and larger residential systems.

What the licensing path generally looks like:

Getting licensed in Georgia starts with getting your hands dirty. You’ll need to document four years of hands-on experience for Class I or five years for Class II in conditioned air work covered by the Georgia Heating and Air Conditioning Code. 

For Class I, that means two years as a lead mechanic on residential installations, one year as a service technician (with EPA certification), one year of residential supervisory experience, and the completion of a Board-approved heat loss/gain and duct design course. 

Class II requires two years of lead mechanic installation with at least one year commercial-only, one year as a service tech or supervisor, two years of commercial supervisory experience, and that same design course. 

Up to two years of technical school education can count toward experience. Once your experience is locked in, you’ll pass the appropriate exam with a score of at least 70%, submit three references from licensed contractors, architects, engineers, or inspectors, and pay your fees. 

The Board handles applications through the GOALS online portal, and licenses renew biennially with continuing education requirements. One thing to keep in mind: Georgia’s conditioned air license is separate from plumbing, electrical, and general contracting.

For a more detailed breakdown, see our Georgia HVAC License Requirements guide.

Hawaii

License model: State contractor licensing required for HVAC work, with separate classifications for air conditioning and refrigeration.

Official licensing authority or regulator: Hawaii Department of Commerce and Consumer Affairs (DCCA) Contractors License Board

Hawaii takes a specialty contractor approach to HVAC licensing. There’s no standalone journeyman license for technicians, but if you want to contract or serve as a qualifying individual for a business, you’ll need one of the state’s specialty classifications. The DCCA Contractors License Board oversees the process, and the license you pursue depends on whether you’re working on comfort cooling or commercial refrigeration.

HVAC-related license or certification types:

  • C-52 Ventilating and Air Conditioning Contractor – Covers installation, alteration, and repair of air conditioning systems, heating equipment, and related ductwork.
  • C-40 Refrigeration Contractor – Covers installation, maintenance, and repair of commercial and residential refrigeration units, cold storage rooms, and related cooling systems.

What the licensing path generally looks like:

To get your HVAC license in Hawaii, you’ll need to meet the Board’s experience requirement first.

Applicants must demonstrate a minimum of four years of journey-level experience in the applicable trade within the preceding ten years. That experience can be documented through employment records, affidavits, or equivalent evidence the Board accepts.

Once your experience is squared away, you’ll need to pass the state contractor licensing examination. This is a trade knowledge exam covering applicable codes, installation standards, and safety requirements. A Business & Law exam may also be required, with a passing score of 75%.

You’ll also need to secure general liability insurance (minimums typically run $100,000 per person, $300,000 per occurrence, and $50,000 property damage), workers’ compensation if you have employees, and a surety bond that can range from $5,000 to $300,000 depending on your classification.

Each licensed contracting entity must designate a Qualifying Individual (a person who holds the trade license and is responsible for the firm’s licensed work).

Licenses renew biennially with continuing education requirements. Important note: a C-52 doesn’t cover refrigeration, and a C-40 doesn’t cover comfort cooling. So, if your work crosses both lines, you’ll need to hold both licenses.

For a more detailed breakdown, see our Hawaii HVAC License Requirements guide.

Idaho

License model: State licensing required at every level of HVAC work (apprentice, journeyman, and contractor) with specialty licenses available.

Official licensing authority or regulator: Idaho Division of Building Safety (DBS) under the Division of Occupational and Professional Licenses

The Gem State doesn’t mess around when it comes to HVAC oversight. Idaho requires licensing at every career stage, from apprentice all the way up to contractor. The Division of Building Safety administers one of the more comprehensive HVAC licensing programs in the country, with apprentice, journeyman, and contractor levels all clearly defined.

HVAC-related license or certification types:

  • HVAC Apprentice – Your entry point. Allows installation, modification, repair, or alteration of HVAC systems under the supervision of a licensed journeyman.
  • HVAC Journeyman – Allows independent HVAC work under the direction of a licensed contractor. You can also supervise apprentices.
  • HVAC Contractor – The top tier. Allows unsupervised installation, maintenance, and repair of HVAC systems. You can operate a business and employ journeymen and apprentices.

What the licensing path generally looks like:

Getting licensed in Idaho starts with registering as an apprentice. For that, you’ll need to be at least 18 years old (or 16 with the STRAP program) and employed by a licensed contractor. From there, you’ll complete a four-year apprenticeship with 8,000 hours of on-the-job training and 576 hours of classroom instruction (144 hours per year). 

Once you’ve got those hours under your belt, you can test for the journeyman license. The test is currently a 100-question, four-hour open-book exam covering the International Mechanical Code, International Fuel Gas Code, and a whole lot of trade knowledge. You’ll need at least a 70% to pass. 

After logging two years as a licensed journeyman, you’re eligible to sit for the contractor exam, which adds business and law topics to the mix. Contractors also need to provide a $2,000 compliance bond. 

All licenses renew annually, with fees ranging from $50 for an apprentice to $150 for a contractor. 

For a more detailed breakdown, see our Idaho HVAC License Requirements guide.

Indiana

License model: No statewide HVAC contractor license. Licensing and permitting are handled at the city and county level.

Official licensing authority or regulator: Local city/county building departments (e.g., Indianapolis Department of Business and Neighborhood Services)

Indiana doesn’t follow a one-size-fits-all approach when it comes to HVAC licensing. Instead, the state leaves it up to individual cities and counties to set their own requirements. That means the rules for working in Indianapolis might look a bit different from what you’d need in Fort Wayne or Evansville. If you’re planning to cover multiple areas, you’ll likely be navigating several different licensing systems at once.

HVAC-related license or certification types:

  • Air Conditioning Class “A” (Unrestricted) – No limitations on system size or type.
  • Air Conditioning Class “B” (Restricted) – Limited to systems up to 25 tons cooling or 500,000 BTUs heating; boiler pressures up to 15 psig steam and 30 psig water.
  • Air Conditioning Class “D” (Restricted) – Limited to 5 tons cooling or 300,000 BTUs heating.
  • Refrigeration – Covers commercial refrigeration work.
  • Sheet Metal – For HVAC ductwork installation.

What the licensing path generally looks like:

To get licensed in Indiana, start by determining where you plan to perform HVAC work. Each city or county has its own application, exam, and fee structure. So, call the local building department before you begin your process of getting licensed.

In the city of Indianapolis, for example, you’ll need five years of practical work experience (or a combination of experience and school, with a maximum of two years from education). You’ll then need to pass the appropriate Prometric exam with a minimum score of 70%, appear for an interview before the Board of Heating & Cooling Examiners, and secure board approval.

After passing the exam, you’ll submit proof of a surety bond, general liability insurance, and workers’ compensation coverage, along with your application and fees.

The Indiana Professional Licensing Agency (IPLA) also issues HVAC contractor licenses for businesses performing installation, replacement, or major repair work, so be sure to verify whether your scope requires that credential as well.

Iowa

License model: State contractor licensing required for all mechanical work, with apprentice, journeyman, master, and contractor levels.

Official licensing authority or regulator: Iowa Plumbing and Mechanical Systems Board under the Department of Inspections, Appeals, and Licensing

Iowa takes a comprehensive approach to HVAC licensing. Anyone working in the mechanical systems trades, or contracting for services in these trades, is required to be licensed by the Iowa Plumbing and Mechanical Systems Board. The state issues licenses at every career stage, from apprentice through contractor, and a valid Iowa mechanical contractor license allows you to operate anywhere in the state.

HVAC-related license or certification types:

  • HVAC Mechanical Apprentice – Entry-level license for individuals learning the trade under supervision.
  • HVAC Mechanical Journeyperson – Allows independent mechanical work under a licensed contractor.
  • HVAC Mechanical Master – Qualifies an individual to serve as a contractor’s qualifying agent; requires an additional examination beyond journeyman level.
  • HVAC Mechanical Contractor – Business entity license for companies contracting for HVAC work.

What the licensing path generally looks like:

Getting licensed in Iowa starts with choosing your track. For individual technicians, the path begins with an apprentice license, followed by four years of documented field experience to qualify for the journeyperson exam. The journeyperson examination covers trade knowledge, codes, and installation standards.

From there, you can advance to master level by passing an additional exam covering advanced system design, code interpretation, and safety standards. For businesses, the mechanical contractor license requires the contracting entity to designate a qualifying individual who holds a master license.

You’ll also need to provide proof of workers’ compensation insurance, unemployment insurance compliance, a public liability insurance policy, and a surety bond. All applications are filed with the DIAL board, and license fees are established by the board.

For a more detailed breakdown, see our Iowa HVAC License Requirements guide.

Kansas

License model: No statewide HVAC contractor license. Licensing and permitting are handled at the city and county level.

Official licensing authority or regulator: Local city/county building departments (e.g., Wichita’s Metropolitan Area Building and Construction Department, Johnson County Contractor Licensing)

Kansas is another state where you won’t find a single statewide HVAC license. Instead, licensing requirements are determined and enforced at the local level through the state’s “Home Rule” approach. HVAC contractors and technicians must verify and comply with the specific regulations of each municipality or county where they intend to perform work. Local authorities typically establish their own requirements for experience, education, and passing examinations.

HVAC-related license or certification types:

  • HVAC Contractor – Business entity license for heating, ventilation, and air conditioning work.
  • Master HVAC Mechanic – Individual license for advanced-level technicians; typically requires two or more years as a journeyman or four years of field experience.
  • Journeyman HVAC Mechanic – Individual field worker credential; requires a minimum of two years of documented field experience.

What the licensing path generally looks like:

Because there’s no single state process in Kansas, your first step is figuring out what city you’ll be working in. Each city or county has its own application, exam, and fee structure. So, you’ll need to contact each target jurisdiction’s building department to ask what’s required.

In most localities, you’ll need to document qualifying field experience (typically two to four years) and pass one or more exams. Many areas require a trade exam and sometimes a business and law exam, with a minimum passing score of 75%. You’ll also need to secure general liability insurance (often with minimum coverage ranging from $300,000 to $500,000), and workers’ compensation is mandatory for businesses with a gross annual payroll exceeding $20,000.

Many cities and counties also require a surety bond, which can range from $1,000 to $50,000 depending on the municipality. All applications are processed through the Kansas Department of Health and Environment (KDHE) in coordination with the State Board of Examiners in Plumbing, Heating, Ventilating, Air Conditioning and Refrigeration.

Kentucky

License model: State licensing required at apprentice, journeyman, and master contractor levels.

Official licensing authority or regulator: Kentucky Department of Housing, Buildings and Construction – Division of HVAC

Kentucky’s been licensing HVAC pros since 1995, and the system hasn’t changed much and the process is pretty straightforward. The state requires anyone doing heating and air conditioning work to hold either a Master HVAC Contractor license or a Journeyman HVAC Mechanic license, with apprentices registered along the way. The Department of Housing, Buildings and Construction runs the show through its Division of HVAC, and they’ve got a clear ladder to climb.

HVAC-related license or certification types:

  • Apprentice Certificate of Registration – Your entry point. Lets you work under the supervision of a licensed journeyman or master while you build hours.
  • Journeyman HVAC Mechanic License – Allows you to perform HVAC work under the general direction of a master contractor. Requires 3,000 verifiable work hours.
  • Master HVAC Contractor License – The top credential. Authorizes you to contract independently, pull permits, supervise journeymen and apprentices, and run your own operation.

What the licensing path generally looks like:

If you’re just getting started in the Bluegrass State, you’ll begin by registering as an apprentice. The form is simple, and there’s no application fee. 

From there, you’ll log 3,000 verifiable work hours under supervision before you’re eligible to test for the journeyman license. Once you’ve got those hours, you apply to take the journeyman exam through the International Code Council (ICC) – not the Division itself. Pass that, and you’re a journeyman!

To move up to master contractor, you’ll need additional experience (which the Board evaluates case by case), pass another ICC exam covering the International Mechanical Code and Kentucky amendments, and submit a $250 application fee for a 12-month license. You’ll also need to provide proof of insurance and, once licensed, renew annually by your birth month. 

Kentucky does offer reciprocity with states that have substantially similar requirements, though it’s handled case by case. One other thing to also keep in mind: a master contractor is legally responsible for all work performed by employees and subcontractors under that license.

For a more detailed breakdown, see our Kentucky HVAC License Requirements guide.

Louisiana

License model: State contractor licensing required for mechanical work over certain dollar thresholds, with mechanical and residential classifications.

Official licensing authority or regulator: Louisiana State Licensing Board for Contractors (LSLBC)

Louisiana’s licensing system is all about the money — literally. The state doesn’t require a license for every HVAC job, only for projects that cross specific dollar thresholds. For commercial work, you need a license when the project value exceeds $10,000 (labor and materials included). For residential work, the threshold jumps to $50,000. The LSLBC handles all contractor licensing, and the agency operates on a classification system that splits mechanical work into major categories and subclassifications.

HVAC-related license or certification types:

  • Mechanical Contractor (Major Classification) – The broadest credential. Allows you to bid, contract, and perform any kind of mechanical work without limit anywhere in the state.
  • Heat, Air Conditioning, Ventilation, Duct Work, and Refrigeration (Subclassifications) – The specific HVAC-R sublicense under Mechanical. Covers installation, maintenance, and repair of air conditioning, ventilation, refrigeration, coolers, freezers, and ice rinks.

What the licensing path generally looks like:

Getting licensed in Louisiana starts with figuring out what kind of work you’ll be doing and whether you even cross the threshold.

If you do, you’ll need to be at least 18 years old, provide a valid Social Security number or taxpayer ID, and demonstrate experience either through a formal apprenticeship, a two-year Associate of Applied Science degree in HVAC, or equivalent documented field experience. 

You’ll also need to show a financial statement proving at least $10,000 in net worth, current within 12 months. From there, you’ll pass two exams administered by the LSLBC: a trade exam (100 questions, closed-book, four hours) and a business and law exam.

One major advantage for contractors holding the Mechanical Contractor classification is that they can pull permits in any parish or municipality without taking a local exam. 

For a more detailed breakdown, see our Louisiana HVAC License Requirements guide.

Maine

License model: State licensing for HVAC technicians through the Maine Fuel Board, with separate tracks for oil/solid fuel and warm air systems.

Official licensing authority or regulator: Maine Office of Professional and Occupational Regulation (OPOR) – Maine Fuel Board

Maine doesn’t hand out a single “HVAC license.” Instead, the state’s licensing system is built around the specific equipment you work on. The Maine Fuel Board oversees credentials for oil, solid fuel, propane, and natural gas technicians, with separate tracks for each. If you’re working on oil burners, you follow the oil and solid fuel path; if you’re handling gas, you go the propane and natural gas route. They’re not interchangeable, so pick your lane carefully.

HVAC-related license or certification types:

  • Apprentice Oil and Solid Fuel Technician – Entry-level registration for those learning the trade under a licensed master.
  • Journeyman Oil Burner and/or Solid Fuel Technician – Allows installation, service, and repair of oil burning equipment. Requires one year as a licensed apprentice or completion of a Board-approved course.
  • Master Oil Burner and/or Solid Fuel Technician – The top credential for oil work. Requires four years of licensed practical experience, with at least two of those years as a licensed journeyman.
  • Propane and Natural Gas Technician – Covers installing, connecting, and servicing propane or natural gas piping, appliances, venting, and accessories. Requires passing a Board-approved exam and completing a certified training program.
  • Propane and Natural Gas Helper – Required for entry-level workers to safely assist a licensed gas technician on-site. No exam required – just registration.
  • Limited Tank Installer – Covers installing outside residential heating oil storage tanks. Requires completion of a Board-approved training program.

What the licensing path generally looks like:

Your path in Maine depends entirely on what you’re working on. For oil and solid fuel, you start as an apprentice. For this, there’s no exam, just an application, a $40 fee, and a $21 background check.

You’ll work under a licensed master while logging the required hours. To qualify for the journeyman exam, you’ll need either one year as a licensed apprentice, or six months plus completion of a 160-hour Board-approved course with at least 75 hours of lab work.

The exam is administered by PROV, Inc., and you’ll need a 70% to pass. Once you’ve got your journeyman license, you can work under the indirect supervision of a master.

To become a master, you’ll need four years of licensed experience with at least two of those years being as a journeyman, and pass another exam.

For propane and natural gas, you’ll go through the Certified Employee Training Program (CETP) of a national propane gas association, pass a Maine Fuel Board exam, and you’re in.

Helpers just need to register – no exam required.

All licenses renew every two years with eight hours of continuing education.

For a more detailed breakdown, see our Maine HVAC License Requirements guide.

Maryland

License model: State licensing required at every career level (apprentice, journeyman, and master) with restricted and limited contractor options.

Official licensing authority: Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration Contractors

Maryland runs one of the more straightforward licensing systems on the East Coast. The state requires anyone providing HVACR services to hold a license with no exceptions. The Board issues six license types, and the path you take depends entirely on whether you’re just getting your feet wet or ready to run the show.

HVAC-related license or certification types:

  • Apprentice – Your starting point. Allows you to train under the supervision of a licensed master or journeyman who must be present on the jobsite. You cannot work alone or enter contracts.
  • Journeyman Restricted – Same as journeyman, but limited to a specific scope of work.
  • Journeyman – Allows you to perform HVACR work under the direction and control of a licensed contractor.
  • Limited Contractor – Allows you to contract independently, but within a restricted scope. Requires two years as a journeyman and 1,000 hours in the year prior to applying.
  • Master Restricted – The full contractor license, but limited to a specific specialty. Requires three years as a journeyman and 1,875 hours in the year prior.
  • Master – The top credential. Allows unlimited contracting, pulling permits, and supervising others. Requires three years as a journeyman and 1,875 hours in the year prior.

What the licensing path generally looks like:

Getting licensed in Maryland means you must start at the bottom of the licensing tier. You’ll register as an apprentice with the Board and begin logging hours under supervision.

To qualify for the journeyman exam, you’ll need four years as an apprentice with at least 6,000 hours of training under a licensed contractor. Pass the journeyman exam with a 70%, and you’re in.

From there, you can climb to master, but you’ll need three more years as a journeyman, at least 1,875 hours in the year before you apply, and another exam to pass.

If you’re aiming for a limited contractor license, the bar is a bit lower: two years as a journeyman and 1,000 hours in the prior year.

Application and renewal fees range from $25 for an apprentice to $225 for a limited license.

For a more detailed breakdown, see our Maryland HVAC License Requirements guide.

Massachusetts

License model: State licensing for sheet metal workers and refrigeration technicians, with separate credentials for ductwork and refrigerant systems.

Official licensing authority or regulator: Massachusetts Board of State Examiners of Sheet Metal Workers & Board of Pipefitters and Refrigeration Technicians

Massachusetts does things a little differently. There’s no single “HVAC license” here. Instead, the state licenses sheet metal workers (for ductwork) and refrigeration technicians (for refrigerant systems) separately. If your work involves both, you’ll need credentials in each. Massachusetts is also currently rolling out a new HVAC construction supervisor license for systems under 10 tons, so the landscape is shifting.

HVAC-related license or certification types:

  • Refrigeration Apprentice – Required for entry-level trainees to gain practical refrigeration experience under a licensed Refrigeration Contractor or Technician.
  • Refrigeration Technician (Type I & Type II) – Covers installation, maintenance, and repair of refrigeration systems. System capacity determines which type you need.]
  • Refrigeration Contractor – Covers operating an independent business and employing licensed technicians and apprentices.
  • Apprentice Sheet Metal Worker – Entry-level for ductwork installation and fabrication. Must be enrolled in an approved apprenticeship program.
  • Journeyperson Sheet Metal Worker – Allows field installation and fabrication under a licensed master. Requires completion of an 8,000-hour apprenticeship.
  • Master Sheet Metal Worker – Authorizes contracting and supervision of sheet metal work, including ductwork fabrication and installation. Requires 2–4 years as a licensed journeyman.

What the licensing path generally looks like:

In Massachusetts, your licensing path depends on the type of work you plan to perform. For refrigeration, you’ll typically start as a registered apprentice, working under a licensed refrigeration contractor or technician.

From there, you’ll complete the required training and work experience (typically 8,000 hours) for journeyman-level competence before taking the exam for a Refrigeration Technician license. The refrigeration system’s capacity determines whether you need a Type I or Type II technician license.

Once you’ve earned your technician license and gained the required additional experience, you can advance to a Refrigeration Contractor license, allowing you to operate your own refrigeration business.

If you specialize in ductwork, the sheet metal path generally progresses from apprentice to journeyperson and then master. Journeyperson licensure requires 8,000 hours of experience and passing the exam, while master licensure generally requires two to four years of journeyperson experience.

Across these paths, you’ll need to be at least 18 years old, have a high school diploma or GED, and pass the state exam with a 70% score.

Installing more than three feet of ductwork requires a sheet metal license, while refrigeration work requires the appropriate technician license.

Licenses also require periodic renewal and continuing education.

For a more detailed breakdown, see our Massachusetts HVAC License Requirements guide.

Michigan

License model: State mechanical contractor licensing required for HVAC work, with classification-based credentials and no separate technician license.

Official licensing authority or regulator: Michigan Bureau of Construction Codes under the Department of Licensing and Regulatory Affairs

Michigan takes a contractor-focused approach to HVAC licensing. The state doesn’t issue individual technician or master licenses but it instead licenses mechanical contractors through a classification system. If you want to work independently, you’ll need a mechanical contractor license with the right classification for the work you do. If you’re an employee, you may only need the federal EPA certification, but your employer will need the contractor license to pull permits.

HVAC-related license or certification types:

  • Mechanical Contractor – Covers general contracting for the installation, alteration, servicing, and repair of HVAC and mechanical systems across various authorized work classifications.
    • Classification 2/HVAC Equipment – The workhorse classification. Covers installation, service, and repair of HVAC equipment, including gas piping, venting, and equipment installation. Covers about 80% of residential mechanical work.
    • Classification 3/Ductwork – Covers fabrication and installation of ductwork systems.
    • Classification 4/Refrigeration – Covers installation, service, and repair of refrigeration systems.

What the licensing path generally looks like:

Getting licensed in Michigan starts with choosing your classification. Each classification has its own experience requirements, but the baseline is three years (or 6,000 hours) of verifiable experience under a licensed contractor. You’ll also need to be at least 18 with a high school diploma or GED.

From there, you’ll pass a written trade exam administered by PSI with a 70% passing score. The exam fee is $30. Once you pass, you’ll submit your application to the Bureau of Construction Codes with proof of experience, EPA 608 certification, and any required insurance or bond documentation.

Licenses renew every three years with continuing education requirements. One thing to keep in mind: you can hold multiple classifications if your work crosses different scopes. Also, as always, anyone handling refrigerants needs EPA Section 608 certification – Michigan requires at least Type II or Universal.

For a more detailed breakdown, see our Michigan HVAC License Requirements guide.

Minnesota

License model: No statewide HVAC license. State requires a mechanical contractor bond for businesses, while individual licensing is handled locally.

Official licensing authority or regulator: Minnesota Department of Labor and Industry (DLI) – local city/county building departments

Unlike plumbing and electrical work, Minnesota does not issue a statewide HVAC technician or contractor license. The state’s main regulatory requirement is that any business engaged in heating, cooling, ventilation, or refrigeration work must file a $25,000 mechanical contractor bond with the DLI. Beyond that, licensing and permitting authority falls to cities and counties, and those local requirements can vary significantly depending on where you’re working.

HVAC-related license or certification types:

  • Mechanical Contractor Bond (Statewide) – Required for any business performing HVAC, refrigeration, or mechanical work in the state. Must file a $25,000 bond with the DLI.
  • Local HVAC License – Many cities and counties require their own contractor or technician licenses (e.g., Minneapolis, St. Paul).
  • Local Technician Certification (Comp Card) – Some jurisdictions require individual technicians to hold a local competency card or trade license.

What the licensing path generally looks like:

In Minnesota, your first move is figuring out where you’ll be working. The state doesn’t license technicians or contractors, so there’s no single path to follow.

For businesses, you’ll need to file the $25,000 mechanical contractor bond with the DLI and pay the $100 filing fee; that’s the only statewide requirement in Minnesota.

From there, you’ll need to check with each city or county where you plan to pull permits. Minneapolis, for example, requires contractors to hold a city-issued HVAC A or B license, while St. Paul has its own licensing and insurance requirements.

For individual technicians, the state doesn’t require a license at all, but many cities have their own rules. For instance, Minneapolis requires a city trade license, while other jurisdictions may require a competency card. Though, no matter where you work, federal EPA Section 608 certification is required for anyone handling refrigerants. Since there’s no statewide license, Minnesota doesn’t offer reciprocity agreements with other states and all local requirements must be met individually.

Mississippi

License model: State contractor licensing required for work above certain dollar thresholds, with both major and specialty classifications.

Official licensing authority or regulator: Mississippi State Board of Contractors (MSBOC)

In Mississippi, HVAC contractors may need a state contractor license depending on the type and value of the project. For residential remodeling or repairs, a state license is required for projects valued at $10,000 or more. For new residential construction and commercial projects, the threshold is $50,000 or more. Projects below those thresholds may be subject to local licensing requirements.

HVAC-related license or certification types:

  • Mechanical – Covers heating, cooling, refrigeration, associated equipment piping and ductwork, and plumbing.
  • Specialty: Heating, Ventilation, Air Conditioning – Covers HVAC and refrigeration work within the approved specialty scope.
  • Specialty: Ductwork for Heating, A/C and Ventilation – Covers unlimited ductwork installation, maintenance, and repair for heating, air conditioning, and ventilation systems.
  • Specialty: Boiler Installation and Repair – Covers boiler installation and repair.
  • Specialty: Refrigeration – Covers commercial and industrial refrigeration installation, maintenance, and repair.
  • Residential HVAC – Covers HVAC installation, maintenance, and repair on residential structures.
  • Residential Mechanical – Covers both residential HVAC and plumbing installation, maintenance, and repair.

What the licensing path generally looks like:

Start by choosing your classification and documenting the required field experience. You’ll also need a financial statement demonstrating minimum net worth of $50,000 for the major Mechanical classification or $20,000 for specialty classifications.

Applicants then take the required exams administered by PSI, including the applicable trade exam and the Mississippi Law and Business Management exam. The trade exam is typically open-book, with 80 questions and a four-hour time limit, and a score of 70% or higher is required to pass.

After passing the exams, submit your application to the MSBOC along with proof of general liability insurance (at least $500,000 per occurrence for residential work or $1,000,000 for commercial work) and workers’ compensation coverage if you have employees.

Commercial applications cost $400, plus $100 for each additional classification; residential applications cost $50.

For a more detailed breakdown, see our Mississippi HVAC License Requirements guide.

Missouri

License model: No statewide HVAC contractor license. Licensing and permitting are handled at the city and county level.

Official licensing authority or regulator: Local city/county building departments (e.g., Kansas City, St. Louis)

Missouri is another one of the few states where you won’t find a statewide HVAC license. The state doesn’t issue mechanical or HVAC contractor licenses at all. Instead, licensing is handled entirely at the local level through cities and counties. A bill (SB 31) that would have created a statewide mechanical contractor licensing system died in the 2025 legislative session and has failed to pass in multiple prior sessions dating back to 2018. So, for now, it’s all local.

HVAC-related license or certification types:

  • Mechanical/HVAC Contractor License – Required by many cities and counties (e.g., Kansas City, St. Louis, St. Charles County). Requirements vary by jurisdiction and typically include passing an exam, providing proof of insurance, and demonstrating field experience.
  • Class D: Mechanical, Electrical and Plumbing Contractor – A combined license category used in some jurisdictions (e.g., Raymore) that allows contractors to perform mechanical (HVAC), plumbing, or electrical services.
  • Local Business License – Some municipalities require a separate business license in addition to the contractor license.

What the licensing path generally looks like:

Because there’s no single state process in Missouri, your first move is figuring out where you’ll be working. Each city and county has its own application, exam, and fee structure. So, you’ll need to check with each local building department where you plan to pull permits.

Most jurisdictions require applicants to be at least 21 years old, document a minimum of 7,500 hours of verifiable field experience (about 3.5 years of full-time work), and pass a standardized mechanical assessment test. Some areas accept an engineering degree with relevant experience as a substitute for the field hours.

You’ll also need to secure general liability insurance (some areas require $500,000 minimum) and, in many cases, post a surety bond. Workers’ compensation is also required if you have employees.

Montana

License model: No statewide HVAC technician license. Contractors must register with the state, and local jurisdictions may have additional requirements.

Official licensing authority or regulator: Montana Department of Labor and Industry (DLI) 

Montana doesn’t require a statewide HVAC “license” in the traditional sense – unlike plumbers or electricians, HVAC professionals aren’t subject to a state-issued technical license or exam. Instead, HVAC contractors are required to register with the Montana DLI to legally operate their businesses. The state places significant responsibility for vetting HVAC contractors on the hiring party rather than requiring state-level certification.

HVAC-related license or certification types:

  • Construction Contractor Registration (CCR) – Required for business owners who form corporations, manage LLCs, or intend to hire employees. Valid for two years and requires proof of workers’ compensation insurance.
  • Independent Contractor Exemption Certificate (ICEC) – For sole proprietors with no employees. Allows exemption from workers’ compensation coverage for themselves. Valid for two years.
  • Local HVAC Licenses – Some municipalities, including Missoula, Billings, and Great Falls, may require additional city business licenses or surety bonds.

What the licensing path generally looks like:

In Montana, your first stop is determining whether you’re operating as a business with employees or as a sole proprietor. If you’re forming an LLC or corporation and hiring workers, you’ll register with the DLI as a Construction Contractor, that means filing the required paperwork, paying the fee, and providing proof of workers’ compensation coverage.

If you’re working solo, the Independent Contractor Exemption Certificate is your route. Beyond that, you’ll need to check with each city or county where you plan to work. Places like Missoula may require a local business license or surety bond. Also, anyone handling refrigerants must hold EPA Section 608 certification, a federal requirement that applies regardless of state registration status.

Nebraska

License model: No unified statewide HVAC license. State requires mechanical contractor registration for businesses, with additional local licensing in some municipalities.

Official licensing authority or regulator: Nebraska Department of Labor 

Nebraska doesn’t have a single unified statewide HVAC contractor license. Instead, regulation is distributed: the Nebraska Department of Labor requires businesses performing mechanical work (including HVAC installation and major repair) to hold a Mechanical Contractor registration. Municipalities, particularly Omaha and Lincoln, layer additional local contractor licensing requirements on top of state standards.

HVAC-related license or certification types:

  • Mechanical Contractor Registration – State-issued business entity registration required for companies performing HVAC installation and major repair. Issued at the business level, not to individual technicians.
  • Omaha Air Conditioning/Air Distribution Contractor License – Local license required for ACAD work in Omaha.
  • Lincoln HVAC Contractor License – Local licensing program for HVAC contractors operating in Lincoln.

What the licensing path generally looks like:

In Nebraska, you’ll start at the state level with Mechanical Contractor registration. That’s issued to the business entity, not the individual technician. You’ll need to provide proof of general liability and workers’ compensation insurance, and designate a qualifying individual who holds a journeyman or master-level credential. 

The application is submitted to the Department of Labor with annual renewal required. 

If you’re working in Omaha, you’ll need a local Air Conditioning/Air Distribution Contractor license through the city’s permitting process. Similarly, Lincoln has its own licensing program as well.

Also important to note, if you’re working in a city or village that has established an air conditioning air distribution board, you’ll need a certificate of competency from that local board.

Nevada

License model: State contractor licensing required for HVAC work valued at $1,000 or more.

Official licensing authority or regulator: Nevada State Contractors Board (NSCB)

Nevada requires HVAC contractors to hold a specific state-issued license before performing installation, repair, or replacement work. The NSCB operates under NRS 624.215, which requires a license for any contractor performing work valued at $1,000 or more in combined labor and materials. The state’s classified licensing system offers two main pathways for HVAC-related work: C-1 for plumbing and heating, and C-21 for refrigeration and air conditioning.

HVAC-related license or certification types:

  • C-1: Plumbing and Heating – Covers the installation, service, and repair of plumbing systems, boilers, heating equipment, cooling systems, and circulating air apparatus. The C-1 license also includes multiple subclassifications covering boilers, plumbing, hydronic heating, sheet metal, and more.
  • C-21: Refrigeration and Air Conditioning – Covers the full scope of installation, service, repair, and maintenance of refrigeration units, air conditioning, and ventilation systems. The C-21 license also includes subclassifications for refrigeration, air conditioning, sheet metal, maintenance, solar air conditioning, chilled and hot water systems, and industrial piping.

What the licensing path generally looks like:

To get licensed in Nevada, you’ll need to document at least four years of experience as a journeyman, foreman, supervising employee, or contractor in the specific classification you’re applying for, within the last ten to fifteen years. Up to three years of that experience may be fulfilled through accredited college, university, or board-approved training programs.

Once your experience is documented, you’ll need to obtain a Nevada State Business License identification number from the Secretary of State. Then submit your application to the NSCB with the $300 application fee, pass a background check, and provide a financial statement that influences your license’s monetary limit.

You’ll then need to pass two exams administered by PSI Exams: a trade-specific exam for your chosen classification and a business and law exam (Contractor Management Survey Exam) covering NRS Chapter 624, contracting law, and lien law. Both exams carry a $100 fee per attempt.

Finally, pay the $600 biennial license fee, secure a contractor’s bond (ranging from **$1,000 to $500,000 depending on your license limit), and provide general liability insurance. 

For a more detailed breakdown, see our Nevada HVAC License Requirements guide.

New Hampshire

License model: No statewide HVAC contractor license. The state does not license general HVAC, air conditioning, or refrigeration contractors.

Official licensing authority or regulator: New Hampshire Office of Professional Licensure and Certification (OPLC)

There is no statewide “HVAC contractor” license or exam in New Hampshire. Instead, the state licenses only a narrow set of adjacent trades through the OPLC’s Board of Mechanical Safety and Licensing: fuel gas piping installers, fuel gas installation technicians, fuel gas service technicians, domestic appliance technicians (gas appliances only), hearth system technicians, and master plumbers. In practice, this means installing or servicing a gas furnace or gas-fired boiler requires a state fuel-gas license, but installing or servicing central air conditioning, heat pumps, ductless mini-splits, or other electric HVAC equipment does not require any state credential. Some municipalities (including Manchester and Nashua) require their own local HVAC licenses.

HVAC-related license or certification types:

  • Journeyman Mechanical License – Allows you to perform HVAC work under the supervision of a master license holder. Requires demonstrated field experience (typically 2 years minimum) and a written examination.
  • Master Mechanical License – The highest individual credential. Qualifies you to supervise and perform HVAC installation and service work. Requires 4 years of documented field experience under a licensed master or journeyman and a written examination.
  • Oil Burner Technician License – Administered by the Division of Fire Safety. Required for installation, service, and repair of oil-fired heating equipment. A distinct credential from the mechanical license.

What the licensing path generally looks like:

In New Hampshire, your journey starts with gaining field experience (typically 4,000 to 8,000 hours or 2 to 4 years) working under a licensed master or journeyman. Once you’ve got the hours, you can sit for the journeyman exam administered through the OPLC’s testing process. Pass that, and you’re a licensed journeyman.

To move up the ladder to master, you’ll need additional experience beyond journeyman status and pass another exam. Any company offering HVAC contracting services must register with the OPLC and designate a qualifying license holder (typically a master) responsible for the company’s licensed work.

This business-level registration is separate from individual tradesperson credentials. 

New Jersey

License model: State licensing required for master HVACR contractors, with strict experience and education requirements.

Official licensing authority or regulator: New Jersey State Board of Examiners of Heating, Ventilating, Air Conditioning and Refrigeration (HVACR) Contractors

In New Jersey, anyone who wants to work as a master HVACR contractor must meet the state’s licensing requirements and obtain a license from the State Board of Examiners of Heating, Ventilating, Air Conditioning and Refrigeration Contractors. The licensing process includes specific experience, examination, and application requirements that applicants must complete before they can legally operate as a master HVACR contractor.

HVAC-related license or certification types:

  • Master HVACR Contractor – The only credential New Jersey issues. Authorizes you to contract independently, pull permits, and supervise HVACR work.

What the licensing path generally looks like:

To apply for a New Jersey Master HVACR Contractor license, you must be at least 21 years old and meet one of the state’s four education and experience pathways:

  1. Apprenticeship: Complete a four-year U.S. Department of Labor-approved HVACR apprenticeship, followed by at least one year of journeyperson experience under a licensed Master HVACR Contractor.
  2. HVACR bachelor’s degree: Earn a four-year bachelor’s degree in HVACR, followed by at least one year of journeyperson experience.
  3. Related bachelor’s degree: Earn a four-year bachelor’s degree in a field related to HVACR, followed by at least three years of journeyperson experience.
  4. Trade or technical degree + apprenticeship: Earn a two-year degree from a trade, technology, or community college, complete at least two years of a U.S. Department of Labor-approved apprenticeship, and then gain at least one year of journeyperson experience.

Once you meet the eligibility requirements, submit your license application and $100 application fee and complete the required background check. After the Board approves your application, you can take the HVACR contractor examination. A score of 70% is required to pass.

After passing the examination, you’ll need to obtain the required $3,000 surety bond and general liability insurance to complete the licensing process.

For a more detailed breakdown, see our New Jersey HVAC License Requirements guide.

New Mexico

License model: State licensing required for individual journeymen and contractors, with separate classifications for plumbing, gas fitting, refrigeration, sheet metal, and HVAC contracting.

Official licensing authority or regulator: New Mexico Regulation and Licensing Department (RLD) — Construction Industries Division (CID)

New Mexico’s licensing system splits into two main tracks: journeyman certificates for individual technicians and contractor licenses for businesses. The CID, through its Mechanical Plumbing Bureau, sets qualification standards and examination requirements for both. HVAC work falls primarily under the MM-3 (HVAC Contractor) and MM-98 (Mechanical General) license classifications, though refrigeration and gas-related work intersect with other sub-classifications.

HVAC-related license or certification types:

  • Journeyman Natural Gas Fitter (JG) – Covers performing plumbing work and installing natural gas piping and appliances under a licensed contractor.
  • Journeyman Plumber and Natural Gas Fitter (JPG) – Covers performing plumbing work and installing natural gas piping and appliances under a licensed contractor.
  • Journeyman Refrigerator (JR) – Covers installing, altering, repairing, and servicing refrigeration equipment and systems under a licensed contractor.
  • Journeyman Sheet Metal (JSM) – Covers fabricating, installing, and servicing HVAC ductwork and sheet metal distribution systems.
  • MM-2: Natural Gas Fitting Contractor – Covers contracting to install, service, and maintain natural gas piping, fittings, and heating appliances.
  • MM-3: Heating, Ventilation, and Air Conditioning Contractor – Covers contracting to install, alter, repair, and service HVAC equipment and systems.
  • MM-4: Heating, Cooling, and Process Piping Contractor – Covers contracting for heating, cooling, steam, boiler, and process piping systems.
  • MM-98: General Mechanical Contractor – Covers operating a comprehensive mechanical contracting business involving plumbing, gas, HVAC, and refrigeration.

What the licensing path generally looks like:

In New Mexico, individual technicians start by earning a Journeyman Certificate of Competence. Applicants must be at least 18 years old and document 4,000 hours (two years) of experience in their specific trade. Once you’ve completed the hours, you’ll be eligible to sit for the trade exam.

Journeyman certificates renew every three years with 16 hours of CID-approved continuing education required.

 

To operate as a contractor, you’ll need to take the next step up.

Contractor licenses are issued to business entities or owner-operators, and each must designate a “Qualifying Party” who holds a valid Journeyman Certificate and has documented 8,000 hours (four years) of experience.

The Qualifying Party must pass both a trade-specific exam and the Contractor’s Business and Law exam with a minimum score of 75% on each. Though, a 20-hour CID-approved course can substitute for the business and law exam. You’ll also need a $10,000 surety bond and general liability insurance.

For a more detailed breakdown, see our New Mexico HVAC License Requirements guide.

New York

License model: No statewide HVAC license. Licensing is handled entirely at the local level.

Official licensing authority or regulator: Local city/county building departments (e.g., NYC Department of Buildings, Buffalo, Syracuse, Ithaca)

New York does not issue a single, statewide HVAC contractor license. Instead, licensing authority is delegated to individual municipalities. To operate legally in New York, HVAC technicians and business owners must meet specific requirements, pass examinations, and obtain permits from the cities or counties where they perform work.

HVAC-related license or certification types:

  • Home Improvement Contractor (HIC) License – Required in NYC for residential HVAC work over $200.
  • Oil Burner Equipment Installer License – Required in NYC for work on oil-burning equipment.
  • FDNY Certificates of Fitness – Required in NYC for work on specific systems.
  • Local HVAC Contractor Licenses – Various credentials required by municipalities including Buffalo, Syracuse, and Ithaca.

What the licensing path generally looks like:

New York doesn’t have one statewide HVAC contractor license, so your first step is figuring out where you’ll be working and which local requirements apply.

New York City, for example, requires a Home Improvement Contractor (HIC) license from the Department of Consumer and Worker Protection (DCWP) for certain residential HVAC work, while work involving oil-burning equipment may require an Oil Burner Equipment Installer license from the Department of Buildings. Certain systems may also require an FDNY Certificate of Fitness.

Outside New York City, licensing requirements vary by municipality, including experience requirements, exams, fees, insurance, and renewal schedules. Depending on where you work, you may need 3 to 10 years of experience, written or practical examinations, liability insurance, workers’ compensation coverage, and continuing education.

However, there is one requirement that applies across the entire state: technicians who handle refrigerants must have EPA Section 608 certification under federal law. That requirement follows you wherever you work in New York.

North Carolina

License model: State licensing required for heating contractors and refrigeration contractors, with separate boards governing each trade.

Official licensing authority or regulator: North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors and the North Carolina Board of Refrigeration Examiners 

North Carolina doesn’t issue a single “HVAC license.” The state splits the trade into two tracks: heating contractor licenses governed by the Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors, and refrigeration contractor licenses governed by the Board of Refrigeration Examiners. If your work crosses both, you’ll need credentials from each.

HVAC-related license or certification types:

  • Heating Group 1 – Covers heating systems requiring high or low-pressure steam, vapor, or hot water.
  • Heating Group 2 – Covers integral systems for heating or cooling buildings with mechanical refrigeration capacity in excess of fifteen tons.
  • Heating Group 3 – Covers systems with mechanical refrigeration capacity of fifteen tons or less.
  • Refrigeration Contractor – Covers the installation, maintenance, servicing, and repair of commercial, industrial, and transport refrigeration systems, equipment, machinery, devices, and related components.

What the licensing path generally looks like:

North Carolina has separate licensing requirements for heating and refrigeration contractors. For a heating contractor license, you must document at least 4,000 hours of relevant experience, or approximately two years of full-time work, in the classification for which you are applying. Up to 2,000 hours may be credited for qualifying academic or technical training. Once you meet the experience requirement, apply to the North Carolina Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors, pay the $100 non-refundable examination fee, and pass the state-administered, open-book examination covering trade knowledge and business and law.

After passing, you’ll need to pay the $150 annual license fee. Heating licenses expire December 31 and must be renewed annually.

For a refrigeration contractor license, you must document 4,000 hours of relevant experience under a licensed refrigeration contractor, registered professional engineer, or other qualified industry professional, with up to half satisfied through qualifying education or technical training. The refrigeration examination fee is $100, and the annual renewal fee is $80.

For a more detailed breakdown, see our North Carolina HVAC License Requirements guide.

North Dakota

License model: No statewide HVAC or mechanical contractor license exists. Licensing and permitting is handled by individual cities and jurisdictions with a general contractor license required for jobs exceeding certain dollar thresholds.

Official licensing authority or regulator: North Dakota Secretary of State

North Dakota does not issue a statewide HVAC or mechanical contractor license. The North Dakota State Plumbing Board regulates plumbing but does not license HVAC or mechanical contractors. Instead, HVAC licensing, examinations, and permits are generally administered at the local level, so requirements vary depending on where you plan to work.

HVAC-related license or certification types:

  • North Dakota Contractor’s License – Issued by the Secretary of State and required when the cost, value, or price of a job exceeds $4,000. Applicants must provide liability insurance and, when applicable, proof of workers’ compensation coverage through Workforce Safety & Insurance.
  • Local HVAC/Mechanical Licenses – Cities may require separate HVAC or mechanical credentials, with their own experience, examination, licensing, and renewal requirements.
  • Journeyman HVAC License (Local) – Allows qualified individuals to perform HVAC work under the requirements established by the issuing jurisdiction. Fargo, for example, requires 6,000 hours of practical experience for its journeyman HVAC exams.
  • Master HVAC License (Local) – A higher-level local credential for qualified HVAC professionals. Fargo requires 6,000 hours of journeyman experience plus 4,000 hours of practical experience, for a total of 10,000 hours.
  • Mechanical Contractor License (Local) – Some jurisdictions require a separate mechanical contractor license in addition to the state contractor license. Minot, for example, has its own local mechanical and HVAC licensing requirements.
  • Local HVAC/Mechanical Boards – Individual jurisdictions may establish licensing boards or other local authorities to administer HVAC examinations and licenses. Requirements are specific to each jurisdiction.

What the licensing path generally looks like:

In North Dakota, the licensing process depends largely on where you plan to work and what type of HVAC work you perform.

For projects exceeding $4,000, you generally need a North Dakota contractor license through the Secretary of State. The application requires liability insurance and, when/if applicable, workers’ compensation coverage through Workforce Safety & Insurance. You must then check the requirements of each city or jurisdiction where you plan to work, because a local HVAC or mechanical license may also be required.

Fargo, for example, administers North Dakota reciprocity exams for journeyman and master HVAC licenses. A passing exam is valid in participating jurisdictions, but contractors must still obtain the appropriate local license in each jurisdiction where they work. Fargo requires 6,000 hours for its journeyman exams and 10,000 hours for its master exams.

Bismarck requires 7,600 hours of verified experience for a journeyman license, while a master applicant needs 3,400 hours as a licensed journeyman to qualify for the exam.

Minot also maintains its own local HVAC licensing requirements. EPA Section 608 certification is separately required under federal law for technicians who service equipment containing regulated refrigerants.

Ohio

License model: State HVAC contractor licensing required for covered commercial construction, with separate HVAC, refrigeration, and hydronics classifications and possible additional local requirements.

Official licensing authority or regulator: Ohio Construction Industry Licensing Board (OCILB)

Ohio uses a trade-specific contractor licensing system rather than a single general mechanical license. The OCILB’s Heating, Ventilating, Air Conditioning, and Refrigeration section is responsible for HVAC and refrigeration contractor licensing, while the Plumbing and Hydronics section handles hydronics contractors. Ohio law also allows municipalities to maintain certain local registration or licensing requirements, so a state license does not necessarily eliminate local compliance obligations.

HVAC-related license or certification types:

  • HVAC Contractor – Covers heating, ventilating, and air conditioning contracting.
  • Refrigeration Contractor – Covers refrigeration contracting.
  • Hydronics Contractor – Covers hydronic heating and related systems.

What the licensing path generally looks like:

Ohio’s process begins with qualifying trade experience. To sit for an OCILB examination, applicants generally must be at least 18 years old and have at least five years of experience as a tradesperson in the applicable licensed trade, although Ohio law provides alternative qualification routes for certain engineers and applicants with other acceptable experience. The current OCILB examination application carries a $25 application fee per trade.

Once approved, you’ll take the examination for the applicable specialty, such as HVAC or refrigeration. After passing, the license must be assigned to a contracting company, and the business must meet Ohio’s applicable insurance and other licensing requirements. Ohio also allows local governments to impose additional HVAC, refrigeration, or contractor registration requirements, so a state license does not necessarily eliminate local requirements.

For a more detailed breakdown, see our Ohio HVAC License Requirements guide.

Oklahoma

License model: State licensing required at the apprentice, journeyman, and contractor levels, with limited and unlimited HVAC/R classifications.

Official licensing authority or regulator: Oklahoma Construction Industries Board (CIB)

Licensing in Oklahoma is handled by the CIB and follows a structured licensing path for mechanical and HVAC professionals. Rather than issuing one general HVAC credential, the state moves applicants through three primary levels: Mechanical Apprentice, Mechanical Journeyman, and Mechanical Contractor.

HVAC-related license or certification types:

  • Mechanical Apprentice – Entry-level registration for supervised mechanical work.
  • Mechanical Journeyman – Covers installing, altering, maintaining, and repairing heating, ventilation, cooling, and mechanical systems under contractor supervision.
  • Mechanical Contractor – Authorizes the holder to contract, plan, install, service, and repair mechanical and HVAC systems, and to supervise journeymen and apprentices.

What the licensing path generally looks like:

Oklahoma has one of the clearest career progressions of the nine states: Mechanical Apprentice → Mechanical Journeyman → Mechanical Contractor. Start by registering as an apprentice and work under an active licensed mechanical contractor so your experience can count toward the next level.

To qualify for a journeyman license, applicants generally need at least three years of verifiable mechanical experience, with one year representing 2,000 hours. A mechanical contractor applicant must meet the journeyman requirements plus one additional year of mechanical experience.

The current CIB application fees are $75 for a Mechanical Journeyman license and $330 for a Mechanical Contractor license, with the contractor amount consisting of a $300 license fee plus a $30 application fee. Current renewal fees are $75 for journeymen and $200 for contractors.

After passing the required examination, a contractor must also provide the required bond and insurance before the license becomes active. Oklahoma currently requires a $5,000 corporate surety bond and at least $50,000 in commercial general liability insurance for active mechanical contractors.

For a more detailed breakdown, see our Oklahoma HVAC License Requirements guide.

Oregon

License model: State contractor licensing required for businesses performing regulated HVAC/R work, with specialized limited maintenance and restricted-energy classifications.

Official licensing authority or regulator: Oregon Building Codes Division (BCD) and the Department of Consumer and Business Services

Oregon’s HVAC licensing requirements depend largely on the type of work being performed. Rather than issuing one broad HVAC license, the state uses specialized licenses that cover particular portions of HVAC service, electrical, and controls work. The appropriate license depends on whether the work involves maintaining or repairing HVAC/R equipment itself or performing limited-energy electrical and control work associated with HVAC systems.

HVAC-related license or certification types:

  • Limited Maintenance Specialty Contractor HVAC/R – Covers maintenance, service, repair, and replacement of specified commercial and industrial HVAC/R electrical products.
  • Class A Limited Energy Technician – Covers advanced low-voltage electrical work, HVAC control systems, and protective signaling for life safety equipment.
  • Class B Limited Energy Technician – Covers installation, maintenance, and service of limited energy electrical systems for HVAC equipment, excluding protective signaling systems.

What the licensing path generally looks like:

Oregon takes a scope-based approach rather than using a traditional statewide HVAC journeyman-to-master ladder. For the Limited Maintenance Specialty Contractor HVAC/R path, the business applies through the Building Codes Division and must meet the requirements for its qualified signing supervisor and employee structure. The current license fee is $75. Oregon also requires Limited Maintenance Specialty contractors to submit an employee list.

For individuals performing qualifying limited-energy work, the Class A Limited Energy Technician license carries a current $50 license fee and is renewed every three years.

Because Oregon regulates HVAC-related work according to the electrical scope involved, the correct credential depends on what you are actually installing, maintaining, or repairing. You should determine the appropriate license before applying rather than assuming that your credential covers every type of HVAC work. Permit and inspection fees are separate from the license fees above and vary according to the work being performed.

For a more detailed breakdown, see our Oregon HVAC License Requirements guide.

Pennsylvania

License model: No statewide HVAC contractor license; local governments regulate many contractor and trade requirements, while qualifying home-improvement contractors must register statewide.

Official licensing authority or regulator: Pennsylvania Department of Labor & Industry

Pennsylvania is one of the states where the phrase “HVAC license” can be misleading. The Commonwealth does not generally license or certify construction contractors or their employees at the state level. Instead, individual municipalities may establish their own contractor or trade licensing requirements. Though, Pennsylvania does have a statewide registration requirement for most home-improvement contractors covered by the Home Improvement Consumer Protection Act.

HVAC-related license or certification types:

  • Local HVAC/Mechanical Contractor License – May be required by the city or municipality where work is performed.
  • Local Journeyman or Master HVAC License – Some jurisdictions require individual trade credentials.
  • Home Improvement Contractor Registration – Required for most qualifying residential home-improvement contractors statewide.

What the licensing path generally looks like:

Pennsylvania does not have a single statewide HVAC contractor license, so the first step is determining where the work will be performed and whether that municipality requires a mechanical, HVAC, or contractor credential. Philadelphia, Pittsburgh, and other municipalities can establish their own licensing and permitting requirements.

If your business performs qualifying home improvements, Pennsylvania also requires Home Improvement Contractor Registration through the Attorney General’s Office. The current registration fee is $100 every two years, and the registration system is now operating online. Contractors must also provide proof of at least $50,000 in personal-injury liability coverage and $50,000 in property-damage liability coverage.

For HVAC professionals who handle refrigerants, remember that EPA Section 608 certification is a separate federal requirement.

Rhode Island

License model: State licensing required for HVAC and refrigeration work, with separate apprentice, journeyperson, master, and contractor credentials.

Official licensing authority: Rhode Island Department of Labor and Training (DLT)

Rhode Island takes a trade-specific approach to HVAC licensing. Instead of using one general HVAC contractor license, the state regulates several mechanical trades that commonly overlap with heating, cooling, refrigeration, ductwork, and related systems. The licensing structure progresses from apprentice credentials into Class II and Class I journeyperson licenses, followed by corresponding master-level licenses. Rhode Island also offers a Master Mechanical Contractor credential for professionals who have reached the highest level in both pipefitting and refrigeration.

HVAC-related license or certification types:

  • Refrigeration Apprentice – Entry-level credential for performing refrigeration and air conditioning work while training under a licensed Master.
  • Refrigeration Journeyperson Class II (RJ2) – Covers installing, servicing, and repairing limited-capacity refrigeration systems, including systems up to 20 tons or equivalent, under supervision.
  • Refrigeration Journeyperson Class I (RJ1) – Covers unrestricted commercial and industrial refrigeration and HVAC installation, service, and repair work.
  • Refrigeration Master Class II (RM2) – Allows the holder to operate a business, pull permits, and supervise limited-capacity refrigeration work.
  • Refrigeration Master Class I (RM1) – Allows the holder to operate a business, pull permits, and supervise commercial and industrial refrigeration and HVAC work statewide.
  • Sheet Metal Apprentice – Entry-level credential for trainees learning sheet metal fabrication, ductwork installation, and HVAC layout under supervision.
  • Sheet Metal Journeyperson Class II (SMJ2) – Covers limited residential and light commercial sheet metal ductwork fabrication and installation under the direction of a Master.
  • Sheet Metal Journeyperson Class I (SMJ1) – Covers unrestricted commercial and industrial sheet metal and HVAC ducting fabrication, installation, and alteration.
  • Sheet Metal Master Class II (SMM2) – Allows the holder to contract, pull permits, and supervise limited residential and light commercial sheet metal work.
  • Sheet Metal Master Class I (SMM1) – Allows the holder to contract, pull permits, and supervise commercial, industrial, and complex sheet metal ducting work statewide.
  • Pipefitter Apprentice – Entry-level credential for individuals training to assist with process, heating, and cooling pipework under supervision.
  • Pipefitter Journeyperson Class II (PJ2) – Covers low-pressure heating, process piping, and cooling pipework under the direction of a licensed Master.
  • Pipefitter Journeyperson Class I (PJ1) – Covers high-pressure, process, power, and hydronic heating and cooling piping systems.
  • Pipefitter Master Class II (PM2) – Allows the holder to contract, pull permits, and supervise limited low-pressure heating and hydronic cooling pipework.
  • Pipefitter Master Class I (PM1) – Allows the holder to contract, pull permits, and supervise high-pressure, commercial, and industrial pipefitting work statewide.
  • Master Mechanical Contractor (MMC) – Provides the broadest mechanical contracting authority, covering combined pipefitting, refrigeration, heating, cooling, and process work. Rhode Island law defines this as a top-level credential requiring extensive experience in both pipefitting and refrigeration.

What the licensing path generally looks like:

Rhode Island’s mechanical licensing path is built around the specific trade you intend to practice. Applicants can progress through the refrigeration, pipefitting, or sheet-metal tracks, moving from apprentice-level training into Class II and Class I journeyperson credentials and then the corresponding master-level.

The state’s current fee schedule lists a $75 application fee for the refrigeration, pipefitter, and sheet-metal journeyperson and master licenses. The two-year license fee varies by credential, including $72 for Refrigeration Journeyperson I, $60 for Refrigeration Journeyperson II, $240 for Refrigeration Master I, and $96 for Refrigeration Master II.

At the top of the system is the Master Mechanical Contractor credential. The current state fee schedule lists a $480 two-year license fee for that credential and indicates that it does not require a test.

Your exact experience and examination requirements depend on the trade and license class you pursue. Because Rhode Island distinguishes between journeyperson, master, and contractor-level credentials, make sure you are applying for the credential that matches the authority you actually need. The state also has separate contractor-master classifications, so business owners should confirm whether their work requires one of those credentials in addition to an individual trade license.

For a more detailed breakdown, see our Rhode Island HVAC License Requirements guide.

South Carolina

License model: State licensing required for residential HVAC work over $500 and commercial mechanical/HVAC work over $10,000, with separate residential and commercial licensing paths.

Official licensing authority: South Carolina Department of Labor, Licensing and Regulation (LLR), through the Residential Builders Commission and Contractor’s Licensing Board

South Carolina separates residential HVAC licensing from commercial mechanical contractor licensing. Residential HVAC professionals work through the Residential Builders Commission, while commercial HVAC contractors are licensed through the Contractor’s Licensing Board under the mechanical classifications. That distinction matters because the experience, examination, and business requirements are not identical.

HVAC-related license or certification types:

  • Residential HVAC Installer and Repairer (RBH) – Required for residential HVAC work exceeding $500.
  • Mechanical Contractor – Covers all statewide bidding, managing, and performing commercial and high-tier mechanical, heating, air conditioning, and refrigeration work.
    • Air Conditioning – Commercial classification for air-conditioning work.
    • Packaged Equipment – Commercial classification covering packaged equipment.
    • Heating – Commercial heating classification.
    • Refrigeration – Commercial refrigeration classification.

What the licensing path generally looks like:

South Carolina gives HVAC contractors two primary routes, depending on whether the work is residential or commercial. For residential work, the Residential Specialty Heating and Air (RBH) license currently carries a $135 application fee and $220 license fee, with a $220 renewal fee.

Commercial HVAC work falls under the Contractor’s Licensing Board’s mechanical classifications. Applicants need a qualifying party with at least two years of relevant work experience within the past five years, unless an approved waiver or reciprocity route applies.

The applicant must pass the South Carolina Business Management and Law examination and the applicable technical examination unless eligible for an approved waiver. The current commercial mechanical contractor licensure fee is $350.

Commercial applicants also need to meet the financial requirements for their license group through either a qualifying financial statement or surety bond. Mechanical contractor bond requirements range from $7,000 for Group 1 to $300,000 for Group 5, depending on the contractor’s bid and project limits.

The key is choosing the correct residential or commercial path before applying because the experience, examinations, fees, and financial requirements are not identical.

For a more detailed breakdown, see our South Carolina HVAC License Requirements guide.

South Dakota

License model: No statewide HVAC contractor license; HVAC and mechanical licensing is primarily handled by local governments.

Official licensing authority: Local city and county authorities

South Dakota does not operate a statewide HVAC contractor licensing system. Instead, municipalities have authority to establish licensing requirements for mechanical and HVAC work. That means the credential you need in Sioux Falls may not be the same credential required in Rapid City or another South Dakota community.

HVAC-related license or certification types:

  • Local Mechanical Contractor License – Required by some municipalities for HVAC and mechanical contracting.
  • Local Refrigeration Contractor License – May be required for refrigeration work in certain jurisdictions.
  • Local Journeyman or Installer License – Some cities establish individual HVAC or mechanical credentials.
  • Local Master License – May be required for advanced or supervising work in certain jurisdictions.

What the licensing path generally looks like:

South Dakota does not provide one statewide HVAC contractor license that applies across the state, so your licensing path starts with the city or jurisdiction where the work will be performed. Local licensing can include mechanical contractor, refrigeration contractor, journeyman, master, or other credentials, and the fees are established by the individual jurisdiction.

For example, Sioux Falls requires contractors performing mechanical or HVAC work within the city to obtain a Mechanical Contractors License. Applicants first take the city’s Master Mechanic examination, which requires four years of experience and currently carries a $75 examination fee. Though, a contractor working in Sioux Falls could face a different cost structure from one working in another municipality.

Before beginning the application process, identify every jurisdiction where you intend to contract or pull permits and review its mechanical licensing, examination, registration, insurance, bond, and permit requirements.

You should also budget separately for EPA Section 608 certification if your work involves regulated refrigerants. The federal certification requirement applies regardless of which South Dakota jurisdiction issues your local HVAC or mechanical credential.

Tennessee

License model: State contractor licensing required for HVAC work of $25,000 or more, while smaller projects are generally regulated locally.

Official licensing authority: Tennessee Board for Licensing Contractors

Tennessee’s HVAC licensing system is driven partly by project value and managed by the Tennessee Board for Licensing Contractors. A state contractor license is required before bidding or contracting on HVAC and other mechanical work valued at $25,000 or more. Smaller HVAC projects are generally handled at the local level, where cities and counties may impose their own mechanical or HVAC licensing and permitting requirements.

HVAC-related license or certification types:

  • CMC: Mechanical Contractor – Broader mechanical classification covering HVAC along with other mechanical trades.
  • CMC-C: Mechanical – HVAC/Refrigeration Contractor – State mechanical contractor classification covering HVAC, refrigeration, gas piping, and geothermal HVAC.

What the licensing path generally looks like:

Tennessee’s process starts by determining whether your project crosses the state’s $25,000 contractor-licensing threshold. If you’re contracting for HVAC work at or above that amount, you’ll generally need a contractor license with the CMC-C classification, or the broader CMC classification if your business performs a wider range of mechanical work. CMC-C specifically covers HVAC, refrigeration, gas piping, and solar HVAC/geothermal work.

Applicants must pass the required Business and Law examination and, for CMC-C, the HVAC trade examination. The Board also evaluates the contractor’s financial responsibility and establishes a monetary limit for the license. The current initial contractor license fee is $250.

For projects under $25,000, don’t assume there is no licensing requirement. Tennessee specifically directs contractors to check with the city or county where they intend to work because local governments may require their own HVAC or mechanical license, permits, and inspections. In some jurisdictions, electrical work associated with HVAC installations may also require an appropriate electrical credential.

Tennessee also offers trade-exam waiver arrangements with several states, including Alabama, Mississippi, North Carolina, Ohio, and South Carolina, which can be valuable for experienced contractors relocating into the state.

For a more detailed breakdown, see our Tennessee HVAC License Requirements guide.

Texas

License model: State licensing required for air conditioning and refrigeration contractors, with Class A and Class B licenses and technician credentials for individual workers.

Official licensing authority: Texas Department of Licensing and Regulation (TDLR), Air Conditioning and Refrigeration Contractors

Texas has a statewide licensing system specifically for air conditioning and refrigeration work regulated by the Texas Department of Licensing and Regulation (TDLR). Unlike states that primarily license the business or contractor, Texas also maintains a separate technician pathway. An Air Conditioning and Refrigeration Contractor (ACR) license is required for contractors who install, repair, or maintain air conditioning, refrigeration, or heating systems, and each permanent business location must employ an ACR contractor.

HVAC-related license or certification types:


  • Class A Air Conditioning and Refrigeration Contractor License     – Allows work on air conditioning and refrigeration systems of any size.
  • Class B Air Conditioning and Refrigeration Contractor License – Covers cooling systems up to 25 tons and heating systems up to 1.5 million BTU/hour.
  • Certified Air Conditioning and Refrigeration Technician – Individual technician credential for qualifying HVAC/R work.
  • Registered Air Conditioning and Refrigeration Technician – Allows qualifying work under the supervision of a licensed contractor.

What the licensing path generally looks like:

Texas gives you two main contractor choices: Class A for unrestricted system size or Class B when your work will stay within the state’s 25-ton cooling and 1.5-million-BTU-per-hour heating limits. You’ll also select the endorsement that matches your work, such as Environmental Air Conditioning, Commercial Refrigeration, or Process Cooling or Heating.

To qualify for a contractor license, you generally need either 48 months of practical ACR experience under a licensed contractor during the preceding 72 months, or 36 months of qualifying experience if you’ve held a technician certification for at least 12 months. Certain education, engineering, military, and industrial experience can provide alternative qualification routes.

After submitting your application and documentation, TDLR determines your exam eligibility. Once you pass the appropriate contractor exam, you’ll need to provide proof of commercial general liability insurance before the license can become active. Class A and Class B carry different minimum insurance requirements based on their scope.

Texas also offers a separate technician pathway, making it possible to build experience and credentials before pursuing contractor-level licensing.

For a more detailed breakdown, see our Texas HVAC License Requirements guide.

Utah

License model: State contractor licensing required for HVAC work, with specialty classifications and no separate statewide journeyman license for technicians.

Official licensing authority or regulator: Utah Division of Occupational and Professional Licensing (DOPL)

Utah administers HVAC contractor licensing under the Utah Construction Trades Licensing Act, and the state has restructured its credential system with the H100 HVAC Contractor license, a qualifier-based classification that replaces the former S350 HVAC license. The H100 is the state’s single credential for HVAC contracting, covering the fabrication, installation, and repair of complete warm-air heating, air-conditioning, ventilation, and refrigeration systems.

HVAC-related license or certification types:

  • H100: HVAC Contractor – Covers the fabrication, installation, and repair of complete warm-air heating, air-conditioning, ventilation, and refrigeration systems, including refrigerated rooms and spaces. This is a qualifier-based license: a licensed individual must be responsible for HVAC work performed under a contractor business.

What the licensing path generally looks like:

Utah’s H100 licensing path begins with business registration. Your entity must be registered with the Utah Division of Corporations and Commercial Code, or you can operate as a sole proprietor using your Social Security Number. You’ll then designate a qualifying agent who must meet the experience and certification requirements.

To qualify, you’ll need two years (4,000 hours) of HVAC-specific experience within the past five years, verified by W-2 forms. You’ll also need to hold RMGA (Rocky Mountain Gas Association) certification or an approved equivalent, since the H100 license permits gas line work only when the qualifier holds the appropriate certification. A fingerprint-based background check will also be required beginning January 1, 2027.

From there, you’ll pass two exams through Prov: the Utah Contractor Business and Law Exam and the HVAC (H100) Exam. You’ll need to provide proof of general liability insurance with minimum coverage of $1 million per occurrence and $2 million aggregate, and pay the required application fees. Licenses renew biennially. An important note: the H100 license does not cover electrical or plumbing trade work, so those scopes require separate credentials.

For a more detailed breakdown, see our Utah HVAC License Requirements guide.

Vermont

License model: No statewide HVAC contractor license. Regulation is limited to specific fuel-related trades, with local permitting requirements layered on top.

Official licensing authority or regulator: Vermont Division of Fire Safety with additional oversight from the Office of Professional Regulation (OPR) for plumbing and heating professionals

Vermont does not issue a statewide HVAC contractor license. The state has no standalone HVAC certification or license that covers the entire trade. Instead, regulation is split: the Division of Fire Safety administers licensing for specific fuel-related work, including the Automatic Gas/Oil Heating (A1) license and Refrigeration and Air Conditioning (C3) credentials, while the OPR licenses plumbers and heating professionals at the master and journeyman levels. If you’re working on electric HVAC equipment (central air conditioning, heat pumps, ductless mini-splits) no state credential is required, but local permits may still apply.

HVAC-related license or certification types:

  • Automatic Gas/Oil Heating (A1) – Required for work on natural gas, propane, or oil heating units. Issued through the Division of Fire Safety.
  • Refrigeration and Air Conditioning (C3) – Covers refrigeration and air conditioning systems.
  • Master Plumber / Heating Professional – Overseen by OPR for plumbing and heating work that intersects with HVAC.
  • Local HVAC Permits – Required by many towns and municipalities for installation and replacement work, regardless of state credentials.

What the licensing path generally looks like:

In Vermont, your path depends on what equipment you’re working on. For gas and oil heating equipment, you’ll pursue the A1 license through the Division of Fire Safety. Applicants typically need four years of documented field experience under a licensed master mechanic and must pass a written examination.

For refrigeration and air conditioning, the C3 credential applies. For HVAC work involving electric equipment only, no state license is required, but you should check with the local town or city where you plan to work, as permits are commonly required for installation and replacement. Contractors performing HVAC work in Vermont must be licensed, and master plumbers or heating and ventilation professionals must supervise installations. Also, as always, EPA Section 608 certification is required for anyone handling refrigerants.

For a more detailed breakdown, see our Vermont HVAC License Requirements guide.

Virginia

License model: State licensing required for HVAC contractors and individual tradesmen, with separate contractor classes based on project value and tradesman credentials based on scope of work.

Official licensing authority or regulator: Virginia Department of Professional and Occupational Regulation (DPOR) – Board for Contractors and Tradesmen Program

Virginia regulates HVAC work through the DPOR, with two set tracks: contractor licenses for businesses and tradesman licenses for individual technicians. The Board for Contractors oversees business licensing, while the Tradesmen Program regulates individual HVAC credentials. Any HVAC work valued above $1,000 requires a contractor license under Virginia Code § 54.1-1100.

HVAC-related license or certification types:

  • Residential HVAC Tradesman – Covers HVAC installation, maintenance, and repair services in single-family dwellings and townhouses under the Virginia Residential Code. Commercial work is not permitted.
  • Journeyman HVAC Tradesman – Covers installation, maintenance, and repair of HVAC systems under the direction and supervision of a licensed Master HVAC Tradesman.
  • Master HVAC Tradesman – Covers planning, laying out, installing, and servicing HVAC systems independently, as well as supervising Journeyman tradesmen.
  • Class A Contractor License – Required for businesses contracting HVAC projects of any dollar amount, with no single-project or annual total revenue limits.
  • Class B Contractor License – Required for businesses contracting HVAC projects single-valued between $10,000 and $120,000, up to $750,000 total per year.
  • Class C Contractor License – Required for businesses contracting HVAC projects single-valued between $1,000 and $10,000, up to $150,000 total per year.

What the licensing path generally looks like:

Virginia gives HVAC professionals two distinct routes, depending on whether you’re pursuing an individual tradesman credential or a business contractor license. For a Residential HVAC Tradesman license, you’ll need either two years of practical experience plus 160 hours of formal vocational training, or three years of experience plus 120 hours of training. The Journeyman HVAC Tradesman license requires more: four years of practical experience and 240 hours of formal vocational training, or five years with 160 hours, or six years with no formal training. Once you’ve held your journeyman license, you can pursue the Master HVAC Tradesman license after meeting additional experience requirements.

For contractor licensing, all applicants must complete an 8-hour pre-license education course and pass the appropriate exams. Class A requires five years of experience and a net worth of at least $45,000; Class B requires three years of experience; Class C requires two years of experience.

Licenses are valid for two years and require a 3-hour continuing education course covering the International Mechanical Code for renewal. Virginia offers universal license recognition and exam waivers for out-of-state license holders with three or more years of good standing.

For a more detailed breakdown, see our Virginia HVAC License Requirements guide.

Washington

License model: No single statewide HVAC license. Washington uses a trade-based system where businesses need contractor registration and technicians need specialty electrical certifications for regulated HVAC work.

Official licensing authority or regulator: Washington State Department of Labor & Industries (L&I)

The Evergreen State doesn’t hand out one standard “HVAC license.” Instead, Washington  regulates HVAC work as a bundle of separate scopes – electrical, refrigeration, and plumbing – each with its own credentials. If you’re contracting for HVAC work, you’ll need a state contractor registration. If you’re performing regulated electrical work on HVAC systems, you’ll need a specialty electrician certification. Some cities, including Seattle and Spokane, layer additional local permits and exams on top of state requirements.

HVAC-related license or certification types:

  • Electrical Trainee Certificate – Required for individuals learning the trade to legally perform supervised HVAC electrical work while accumulating hours needed to test for a specialty license.
  • 06A: Specialty Electrician HVAC Refrigeration – Covers unrestricted electrical work on all heating, ventilation, air conditioning, and refrigeration systems regardless of voltage, phase, or amperage.
  • 06B: Specialty Electrician HVAC Refrigeration Restricted – Covers limited electrical work on HVAC systems restricted to a maximum of 240 volts and 120 amps single phase, for residential and light commercial units.
  • Specialty Master Electrician / Electrical Administrator – Supervises specialty electrical work and ensures compliance for HVAC/refrigeration systems within the holder’s certified 06A or 06B specialty classification.
  • Specialty Contractor Registration – Required for business owners contracting for non-electrical HVAC construction work.
  • Specialty Electrical Contractor License – Required for businesses contracting for HVAC-related electrical work; requires an assigned Electrical Administrator or Master Electrician.

What the licensing path generally looks like:

In Washington, your path depends on whether you’re pursuing a business registration or an individual trade certification. For the 06B certification, you can qualify to take the exam after completing 1,000 hours of supervised, on-the-job experience, but you need 2,000 total hours and 24 hours of approved classroom instruction to receive the full certification. The 06A certification requires 4,000 hours of supervised, documented HVAC/refrigeration electrical work plus 48 hours of classroom instruction.

Both exams are administered by PSI and cover the National Electrical Code, Washington electrical laws and rules, electrical theory, and specialty scope. Exams are open-book but code-heavy and time-pressured.

A state-approved apprenticeship is not required for specialty electrician candidates. For contractor registration, there is no Business and Law exam. The business qualifies through documentation, bonding, liability insurance, and an application.

An electrical contractor license requires a UBI number, a $4,000 bond, and an assigned certified Electrical Administrator or Master Electrician. Experience hours must be documented on L&I’s notarized Affidavit of Experience. Licenses renew every three years with 24 hours of continuing education.

For a more detailed breakdown, see our Washington HVAC License Requirements guide.

West Virginia

License model: State licensing required at every level (technician-in-training, residential technician, technician, and contractor) with separate credentials for individuals and businesses.

Official licensing authority or regulator: West Virginia Division of Labor

West Virginia requires a license for all HVAC work in the state, regardless of the dollar amount of the job or whether the individual is affiliated with a licensed contractor. The West Virginia Division of Labor issues four distinct credentials – HVAC Technician-in-Training, HVAC Residential Technician, HVAC Technician, and the Heating, Ventilating & Cooling Contractor license with each one serving a different stage of your career.

HVAC-related license or certification types:

  • HVAC Technician-in-Training – For entry-level individuals with under 2,000 hours of experience performing HVAC work under direct supervision of a certified technician. No exam required.
  • HVAC Residential Technician – Covers installing, maintaining, and repairing HVAC systems specifically in one- or two-family residential dwellings after passing the state residential exam.
  • HVAC Technician – Covers installing, maintaining, altering, and repairing commercial and residential HVAC systems after completing 2,000 hours of experience and passing the trade exam.
  • Heating, Ventilating & Cooling Contractor – Required for businesses bidding or contracting HVAC projects exceeding threshold limits. Requires trade and business law exams and tax registration.

What the licensing path generally looks like:

West Virginia’s HVAC licensing path starts with the Technician-in-Training license. You must be at least 18 years old and submit a completed application with a $25 fee. No exam is required at this stage. Your training license is valid for one year and can be renewed as long as you’re working under direct supervision.

Once you’ve accumulated 2,000 hours of HVAC-related work, training, or experience, you can apply for the HVAC Technician license. You’ll need to pass the state trade exam with a minimum score of 70% and pay the $75 certification fee. 

If you’re focusing exclusively on residential work, the HVAC Residential Technician credential is available for a $50 fee, but this credential is limited to one- and two-family dwellings. Both technician licenses renew annually.

For businesses, the Heating, Ventilating & Cooling Contractor license requires passing both a trade exam and a business law exam, plus registering with the State Tax Department.

West Virginia offers limited contractor reciprocity with select states, including Alabama, Ohio, and Tennessee for HVAC classifications, but individual technicians must still be properly licensed by the West Virginia Division of Labor regardless of contractor reciprocity. 

For a more detailed breakdown, see our West Virginia HVAC License Requirements guide.

Wisconsin

License model: No statewide HVAC contractor license. State registration required for HVAC contractors, with a separate qualifier certification for individuals.

Official licensing authority or regulator: Wisconsin Department of Safety and Professional Services (DSPS)

Wisconsin takes a registration-based approach to HVAC oversight. Under Wis. Admin. Code § SPS 305.70, no person or business may engage in installing or servicing heating, ventilating, or air conditioning equipment unless they hold an HVAC Contractor registration issued by DSPS. Separately, individuals can obtain an HVAC Qualifier certification under SPS 305.71 to serve as the responsible supervising individual for a contracting business. Importantly, Wisconsin does not issue a traditional journeyman HVAC license, the qualifier certification is the individual-level credential.

HVAC-related license or certification types:

  • HVAC Contractor Registration – Business-level registration required for any company installing or servicing HVAC equipment for human comfort or refrigeration systems. Initial application fee is $15.
  • HVAC Qualifier Certification – Individual certification for the person responsible for supervising a registered HVAC contractor’s work. Requires at least 1,000 hours per year for four years of experience, or four years of attendance in a school of mechanical engineering or an accredited college.
  • EPA Section 608 Certification – Required for any technician who installs or services HVAC equipment involving ozone-depleting refrigerants.

What the licensing path generally looks like:

Wisconsin’s process starts at the business level. You’ll register your contracting business with DSPS, paying the $15 registration fee, and designate a qualified individual who holds the HVAC Qualifier certification. The qualifier must document at least 1,000 hours per year for four years of experience supervising or performing HVAC design, installation, servicing, or maintenance or hold a four-year mechanical engineering or related degree.

The applicant for contractor registration must be the owner, a partner, or the CEO of the business. Work in one- and two-family dwellings requires a uniform building permit before installation can begin. Notably, the registration does not cover electrical or plumbing work associated with HVAC equipment – those trades require separate credentials. EPA Section 608 certification is also (federally) required for anyone handling refrigerants.

Wyoming

License model: No statewide HVAC contractor license. Licensing is handled entirely by individual cities and counties, with local contractor registration requirements.

Official licensing authority or regulator: Local city/county building departments (e.g., Cheyenne Building Permitting & Licensing, Casper, Laramie)

Wyoming does not issue a statewide HVAC contractor license. The Wyoming Department of Workforce Services’ official directory of licensed occupations does not list HVAC or mechanical contracting as a state-licensed trade. Instead, licensing for HVAC work is handled entirely by individual cities and counties, and those requirements vary significantly from one jurisdiction to the next.

HVAC-related license or certification types:

  • Local HVAC Contractor Registration – Required by most municipalities for HVAC contractors. Cheyenne issues Class C-1 Plumbing, HVAC, and Refrigeration Contractor licenses along with Master, Journeyman, and Apprentice credentials.
  • Local Mechanical Contractor License – Cities like Cheyenne and Casper require mechanical contractor licenses for HVAC businesses. Requirements typically include documented experience (commonly four years), a written examination, and liability insurance.
  • Local Journeyman and Master Licenses – Some jurisdictions issue individual trade credentials at journeyman and master levels.
  • EPA Section 608 Certification – Required for any technician handling refrigerants, regardless of local licensing status.

What the licensing path generally looks like:

In Wyoming, what you’ll need to do first is decide where you’ll be working. Each city and county has its own application, exam, and fee structure, so you’ll need to contact each local building department where you plan to perform HVAC work.

In Cheyenne, for example, you’ll need to apply through the city’s Building Permitting & Licensing division, submit 12 copies of your contractor license application, provide a certificate of general commercial liability insurance naming the city as certificate holder, and pass the required exam.

Experience requirements are set locally – Cheyenne’s Class C-1 license requires documented hands-on experience, and the application fee is $100 for plumbing/HVAC contractors in some towns.

Licenses are typically issued for one year and must be renewed annually. There’s no statewide reciprocity, so out-of-state contractors must meet each local jurisdiction’s requirements individually.

Conclusion

So, as you can see, becoming a licensed HVAC professional takes more than learning how to install, service, and repair equipment. Depending on where you work and what services you provide, you may also need to meet state or local licensing requirements, document your experience, pass trade and business exams, obtain the appropriate certifications, and satisfy insurance, bonding, or other business requirements.

The biggest takeaway from this guide is that there is no single HVAC licensing path that applies across the country. Some states license technicians and contractors at multiple career levels. Others focus on contractor licensing, specific areas of the trade, or local requirements. In every case, understanding the rules that apply to your specific scope of work is the place to start.

Before you invest time or money in an application, make sure you know which credential you actually need, who issues it, what experience or education you must document, and whether additional local or federal requirements apply. For refrigerant work, that includes the appropriate EPA Section 608 certification. For contractors, it may also mean preparing the business itself to meet licensing, insurance, bonding, and registration requirements.

Licensing is not just a box to check before you can work. It is part of building a legitimate HVAC career or business that can operate within the rules and continue serving customers as your responsibilities grow. Use the state-specific information in this guide as a starting point, then confirm the current requirements with the appropriate licensing authority before you apply.

Making the contracting industry more profitable.

Subscribe to our newsletter

Products
Categories
Services
Industries
Features
Resources
Company
© 2025 Aptora Corporation.
Shop now
Introducing
Unleash the full potential of your business. techs. crews. operations.
Explore 360 now
Inventory and Warehouse Management Book Cover
Free Download

2025 Inventory Techniques for Success

By submitting this form, I agree to receive marketing communication via phone call or email from Aptora Corporation.

Free Download

 

 

By submitting this form, I agree to receive marketing communication via phone call, or email, from Aptora.