HVAC License Wyoming: There Is No State HVAC License, But There Is a State License for the Wiring (2026)

There is no Wyoming HVAC license. The state has no mechanical board, no state HVAC contractor license, and no statewide journeyman or master mechanical credential.

But that is only two thirds of the answer, and the missing third is the reason this page exists. Wyoming does issue a state license that a lot of HVAC work falls under, it is just not filed where anyone looks for it. It lives in the electrical chapter, it is called a Limited Technician license, and the class code is LM-H.

So the honest version of the answer is this. Wyoming does not license you to install a furnace. Wyoming licenses you to wire it. And separately, Casper and Cheyenne license the whole trade themselves, with their own exams, their own fees, and a rule about who your company employs that decides whether you can hold a license at all.

What Wyoming Regulates at the State Level, and What It Does Not

The Department of Fire Prevention and Electrical Safety, inside the State Fire Marshal's Office in Cheyenne, runs Wyoming's only statewide trade licensing ladder. It covers electricians and technicians under W.S. 35-9-120 through 35-9-130.

There is no equivalent chapter for mechanical work. No state HVAC license, no state refrigeration license, no state gas fitter license.

The state does adopt a mechanical code. On June 28, 2024 the State of Wyoming adopted the 2024 International Codes, including the 2024 International Mechanical Code and the 2024 International Fuel Gas Code, alongside the 2024 International Building Code and 2024 International Fire Code.

That is the structural oddity worth naming: Wyoming adopted a full mechanical code and attached no licensing ladder to it. Your work is measured against a state standard, and the state issues you nothing that says you are qualified to meet it. Cities fill that gap, and they do not fill it identically.

The State Credential HVAC Companies Miss: LM-H

Buried in the Limited Technician classes on the State Fire Marshal's licensing page is this, verbatim:

"LM-H Limited electrical work for heating, ventilating and air conditioning systems limited to electrical work on the load side of the equipment disconnect (4,000 Hours)"

That is a state-issued Wyoming license, specific to HVAC, requiring 4,000 hours. It does not appear on any page-one aggregator result for "Wyoming HVAC license," because those pages all stop at "Wyoming has no state HVAC license" and never open the electrical chapter.

The scope limit matters as much as the license. LM-H covers electrical work on the load side of the equipment disconnect. It is not a general electrician's license. It lets a mechanical technician terminate and service the equipment they installed, and it stops there. Running the branch circuit and the disconnect itself is journeyman or master electrician territory.

Three sibling classes sit alongside it in the same list, all at 4,000 hours except where noted:

• LM-E — elevator systems, load side of the equipment disconnect
• LM-S — electric signs, load side of the equipment disconnect
• LM-W — water well and irrigation systems, load side of the equipment disconnect
• LM-L — maintaining light fixtures (1,000 hours)

And here is the part that turns an individual license into a business problem. A Limited Technician in Wyoming cannot operate independently. The State Fire Marshal's page states: "Any Technician performing low voltage work in the State of Wyoming shall be employed at all times by a Low voltage/Limited Contractor who carries a current Wyoming Low Voltage/Limited Contractor's license."

So if your HVAC company is doing its own equipment wiring in Wyoming, the company likely needs a Low Voltage/Limited Electrical Contractor license, which is $200.00 new and $200.00 to renew, expires on July 1 next following the date of issue, and requires the company to "actively employ in a full-time capacity" a Wyoming licensed technician, journeyman or master to serve as the technician of record. That person can be technician of record for only one company.

Technician licenses in Wyoming "can only be obtained through examination." The initial license fee is $100.00 and renewal is $50.00, with a $50.00 late fee, on a three-year cycle renewing July 1.

Wyoming electrical license fees and classes are set by the Department of Fire Prevention and Electrical Safety and change. A 2.5 percent card processing fee applies to online payments effective April 1, 2025 per Wyo. Stat. § 9-4-217(h). Verify current requirements with the Department at (307) 777-7288 before applying.

Casper: A Full Mechanical Ladder

The City of Casper Community Development Department issues mechanical credentials that look very much like the plumbing ones, and its published definitions are refreshingly direct.

Mechanical Apprentice. Authorizes heating, venting, air conditioning, refrigeration "and associated sheet metal work" as an employee of a mechanical contractor. The apprentice license "shall be issued to the mechanical contractor in the name of the applicant and shall be valid only for the term of their employment with that contractor." The card is tied to the employer, not the person.

Mechanical Journeyman. Same scope, performed "as an employee of a mechanical contractor." Requires a certificate of completion from a federally recognized mechanical apprenticeship training program, or the equivalent of four years of experience in a City of Casper licensed mechanical shop, plus proof of successful testing.

Mechanical Master. Requires the apprenticeship certificate or four years of experience in a Casper licensed mechanical shop, and five years of experience as a journeyman or master mechanical in a City of Casper licensed mechanical shop, plus testing.

Mechanical Contractor. Authorizes the business "to conduct, carry on or engage in the business of heating, ventilation, air conditioning, refrigeration and associated sheet metal work." And the operative sentence: "Every applicant shall possess or provide proof of employment of a full-time licensed mechanical master."

Note how much Casper folds into one classification. Heating, ventilation, air conditioning, refrigeration and sheet metal all sit under Mechanical. Cheyenne splits several of those apart, which we come to next.

Casper mechanical exams

• Mechanical Master — International Code Council G29-N or equivalent
• Mechanical Journeyman — International Code Council G31-N, G29-N, or equivalent

Casper mechanical fees

• Mechanical Contractor — new $300.00 · renewal $150.00
• Mechanical Master — new $75.00 · renewal $37.50
• Mechanical Journeyman — new $25.00 · renewal $15.00
• Mechanical Apprentice — new $3.00 · renewal $3.00
• Gas Utility Contractor — new $150.00 · renewal $75.00
• Gas Utility Installer — new $25.00 · renewal $15.00

Gas work has its own lane in Casper. The Gas Utility Contractor classification covers "installation and service of gas piping, from the building out, and appliances, except for water heaters and boilers as defined by the International Mechanical and Fuel Gas Codes, latest editions," and requires proof of employment of a full-time licensed gas utility installer or master plumber. Water heaters and boilers are carved out and land back with plumbing.

Casper insurance minimums

• Public liability, personal injury or death of one person from one incident — $250,000.00
• Personal injury or death of all persons from one incident — $500,000.00
• Property damage from one incident — $250,000.00

Casper fees, exam designations and insurance minimums are set by the city and change. Verify with the Building Inspection Division at (307) 235-8254.

Cheyenne: HVAC and Refrigeration Are Two Different Licenses

The City of Cheyenne Contractor Licensing Regulations, revision dated March 10, 2026, split mechanical work across several separate Class C subcontractor licenses:

• 18.8 HVAC (C1) — tested
• 18.10 Refrigeration (C1) — tested
• 18.15 Gas and solid fuel appliance installation (C2) — non-tested
• 18.4.4 Limited Electrical, Plumbing, refrigeration, or HVAC (C1) — tested

A Casper mechanical contractor doing heating, cooling, refrigeration and sheet metal under one license may need two or three Cheyenne licenses to do the same work, and each tested class requires a qualified supervisor holding the matching class.

Cheyenne also states the stacking rule plainly in Section 1.2.3: "For some trades, (including Plumbing, Electrical, Refrigeration, and HVAC) all employees on a job site are required to hold a master, journeyman or apprentice license or be a qualified supervisor. The holder of a contractor license must employ a person who holds a master or qualified supervisor license in the appropriate building trade."

Every person on your Cheyenne HVAC job site needs a card. Not just the lead tech.

Cheyenne experience requirements

• Master level craft employee (12.1.8) — four years with 8,000 documented hours as an apprentice, or certified equivalent training, and three years with 6,000 documented hours as a journeyman, plus satisfactory examination results
• Journeyman level craft employee (12.1.9) — four years with 8,000 documented hours in the trade as a licensed apprentice, or certified equivalent training, plus exam
• Residential Plumbing/Mechanical Journeyman (12.1.11) — two years with 4,000 documented hours as a licensed apprentice plus the applicable journeyman exam, with apprentice ratios capped at one to one
• Class C qualified supervisor (12.1.4) — three years with 6,000 hours comprehensive experience and/or education, plus exam

Mechanical apprentice ratios are capped at three per licensed journeyman or master. Apprentice supervision steps down 100, 75, 50 and 25 percent across years one to four. All hours require third-party verification under Section 3.2.2, and applicants who do not supply it "will not be considered by the board for licensure."

Cheyenne fees and insurance

• Contractor Class C1, tested — application $50.00 · initial $200.00 · renewal $75.00
• Contractor Class C2, non-tested — application $50.00 · initial $200.00 · renewal $50.00
• Qualified Supervisor or Master — application $50.00 · initial $50.00 · renewal $25.00
• Journeyman — application $50.00 · initial $30.00 · renewal $15.00
• Apprentice — application $10.00 · initial $10.00 · renewal $5.00

Class C subcontractor general liability minimums are $300,000 per occurrence and $600,000 total aggregate, with the City of Cheyenne named as certificate holder and a Wyoming workers compensation letter of good standing required. Exams come through ICC, NICET, NASCLA or another Board-approved agency, paid directly to the testing agency.

Licenses expire annually on the anniversary of issuance. There is no grace period, and a license more than 30 days expired requires passing a current published examination again to get back in. No continuing education requirement appears in the regulations.

The Cheyenne regulations are revised periodically; the edition described here is marked Rev 03/10/2026. Verify current requirements with the Cheyenne Building Division.

The Federal Layer Nobody Can Waive

None of the above replaces EPA Section 608 certification. Any technician who maintains, services, repairs or disposes of equipment that could release regulated refrigerants needs the appropriate Type I, II, III or Universal certification under the federal Clean Air Act. It is federal, it applies in every state including states with no HVAC license at all, and no city credential substitutes for it.

This is the single most common point of confusion in no-license states, because technicians hold an EPA card and reasonably assume it is their license. It is not. An EPA 608 card says you may handle refrigerant. A city contractor license says your company may do the work and pull the permit. You need both, and neither one waives the other.

The Employment Rule That Decides Whether You Can Hold a License

Three separate Wyoming authorities regulate this trade, and all three write the same requirement.

The State Fire Marshal, for the low voltage and limited contractor license an HVAC company may need: the company "must actively employ in a full-time capacity" a Wyoming licensed technician, journeyman or master to be the technician of record, and "A technician of record can ONLY be a technician of record for one (1) company."

Casper, for the Mechanical Contractor license: "Every applicant shall possess or provide proof of employment of a full-time licensed mechanical master."

Cheyenne, Section 13.0, in full:

"An entity may be issued a contractor license under these regulations only if the entity always employs, in an active full-time capacity, a qualified supervisor or master. The qualified supervisor or master shall hold the license of the class corresponding to the class and specialty of the contractor's license, or greater subject to the Building Official's approval."

And Cheyenne Section 13.3 raises the bar higher than almost any jurisdiction in the country:

"A contractor license shall be valid... only if the qualified supervisor or master named in the application is employed by the Licensee in an active, full-time capacity and the employment is the qualified supervisors' or masters' principal employment."

Section 13.1 limits a qualified supervisor to one contractor, except where entities are wholly owned by the same individuals, and puts every one of that person's licenses into inactive status if the rule is broken. Section 13.2 requires the qualified supervisor to be on the job site within 24 hours of a Building Official's notice. Section 14.0 prohibits employing an unlicensed person in the capacity of qualified supervisor, master, journeyman or apprentice.

Read the three together and the pattern is unmistakable. Wyoming has no state HVAC board, but every level of government that touches the trade requires the qualifying individual to be a genuine, full-time employee of the licensed business. This is exactly why a qualifier arrangement in Wyoming has to be a real employment relationship, documented as such, and not a name on an application.

What Happens When Your Qualified Supervisor Leaves

Cheyenne's Section 13.3.1 gives you:

• 3 working days to notify the Building Official in writing
• 30 calendar days to register a replacement
• Up to 30 additional days at the Building Official's discretion "for extreme extenuating circumstances, totaling sixty (60) days"

Past 30 days with no replacement and no extension, the contractor license is "subject to suspension or revocation." During any relief period, companies "shall not be allowed to apply for new permits for projects" without first meeting with the Board or providing an approved equivalent replacement.

For an HVAC company mid-season, a permit freeze is the whole problem. Change-outs stop, new construction work stops, and the crews are still on payroll.

How Much Does It Cost?

The license fees are small. A Casper mechanical master card is $75.00, the mechanical contractor license is $300.00 new and $150.00 to renew, a Cheyenne Class C1 is $50.00 plus $200.00 initial, and the state Low Voltage/Limited Contractor license is $200.00. Add ICC exam fees, general liability at the minimums above, and workers compensation.

The cost that actually decides your timeline is the ladder. Casper's mechanical master route wants four years of apprenticeship or equivalent plus five years as a journeyman or master, both measured in Casper licensed shops. Cheyenne's master wants 8,000 apprentice hours plus 6,000 journeyman hours.

What it costs to bring in a licensed master as your qualifier depends on the situation: which cities you need covered, whether you also need the state limited or low voltage contractor license, the scope and risk of the work, how many licenses have to be held at once, and how quickly you need to be pulling permits. Because that varies enormously, we scope it individually rather than publishing a number that would be wrong for most companies. Walk through your specifics on our consultation packages page.

Frequently Asked Questions

Does Wyoming have a state HVAC license? No. Wyoming has no state HVAC license, no mechanical board and no statewide journeyman or master mechanical credential. HVAC licensing is municipal. However, the state does issue an LM-H Limited Technician license covering electrical work on HVAC systems on the load side of the equipment disconnect, which many HVAC companies need and most guides never mention.

What is an LM-H license in Wyoming? LM-H is a Limited Technician class issued by the Wyoming Department of Fire Prevention and Electrical Safety for "limited electrical work for heating, ventilating and air conditioning systems limited to electrical work on the load side of the equipment disconnect," requiring 4,000 hours. Technicians must be employed at all times by a licensed Low Voltage/Limited Contractor.

Which Wyoming cities license HVAC contractors? Casper issues Mechanical Contractor, Master, Journeyman and Apprentice licenses. Cheyenne issues separate HVAC and Refrigeration Class C licenses plus gas appliance and limited electrical classes. Laramie and Gillette also license trade contractors. Check every city where you plan to work.

Do I need an EPA 608 certification in Wyoming? Yes, if you handle regulated refrigerants. EPA Section 608 is federal and applies regardless of whether a state or city licenses HVAC work. It is not a substitute for a city contractor license, and a city license is not a substitute for it.

Can I run an HVAC company in Wyoming without a master license? Not in Casper or Cheyenne on your own credential. Casper requires "proof of employment of a full-time licensed mechanical master." Cheyenne requires a qualified supervisor or master employed in an "active full-time capacity" whose employment is their "principal employment." If you do not hold the credential yourself, employing a qualifier as a full-time W-2 master is the legitimate route. See how to hire a qualifying agent.

Is HVAC the same license as refrigeration in Wyoming? Not in Cheyenne. Section 18.8 HVAC and Section 18.10 Refrigeration are separate tested Class C licenses. In Casper both fall under the single Mechanical classification, along with sheet metal work. This is one of the clearest examples of why a Wyoming contractor cannot assume one city's scope carries to the next.

What mechanical code does Wyoming use? The State of Wyoming adopted the 2024 International Codes on June 28, 2024 for state jurisdiction, including the 2024 International Mechanical Code and the 2024 International Fuel Gas Code. Municipalities adopt their own editions by ordinance, so confirm the edition enforced where the work is.

Bottom Line

Wyoming does not license HVAC contractors at the state level, and it does adopt a statewide mechanical code, which is an unusual combination. The trade is licensed by cities, and Casper and Cheyenne do it very differently: Casper puts heating, cooling, refrigeration and sheet metal under one Mechanical ladder, while Cheyenne splits HVAC and refrigeration into separate tested licenses and requires every worker on the job site to hold a card.

The state credential to know about is LM-H, the Limited Technician class for HVAC electrical work on the load side of the equipment disconnect. It is real, it is statewide, and almost nobody writing about Wyoming HVAC licensing mentions it.

And across all three levels of government, the same requirement repeats: the licensed individual behind the company must be a full-time employee, and in Cheyenne that employment must be their principal employment.

If you are ready to run a Wyoming HVAC company before you personally hold a master credential, The Licensing Company places licensed masters as full-time W-2 qualifying agents so your business can hold its licenses and keep pulling permits. Start with what a qualifying agent is, see how to hire one, compare requirements on our states overview, or read the national picture in how to get an HVAC contractor license.

Wyoming's plumbing trade runs on the same municipal model with the same full-time master rule, covered in plumbing license Wyoming. The electrical trade is the one thing Wyoming licenses statewide, and it is where the LM-H license actually lives: see electrician license Wyoming. For how neighboring states handle the same no-state-license problem, compare HVAC license South Dakota and HVAC license Montana.

This guide covers Wyoming HVAC licensing and the municipal and state systems that govern it. It is not exam preparation. Fees, classifications, insurance minimums and code editions are set by the state, each city and the testing agencies, and they change. Verify current requirements directly with the relevant authority before you apply.

Last reviewed September 2026.