HVAC License Wyoming: The State LM-H Card, City Mechanical Licenses and the Qualifier Rule (2026)

Wyoming has no state HVAC license. The Department of Fire Prevention and Electrical Safety licenses only the wiring on HVAC equipment, through the LM-H Limited Technician card, and leaves the mechanical trade itself to Casper, Cheyenne, Gillette, Laramie and Jackson. Each city sets its own exams, fees and rules about who your company must employ, and every one of them ties the company license to a named, licensed individual.

At a glance

No state HVAC license. The Department of Fire Prevention and Electrical Safety licenses only electrical work, under W.S. 35-9-120 through 35-9-130.

HVAC wiring on the load side of the equipment disconnect needs an LM-H Limited Technician license: 4,000 hours, then ICC exam 600.

The LM-H card costs $100.00 new, $50.00 to renew, and runs three years to July 1.

Cities license the mechanical trade. Casper and Cheyenne both require a full time licensed master or qualified supervisor behind every contractor license.

Refrigerant work also needs federal EPA Section 608 certification in every city.

New to contractor licensing generally? Start with how to get a contractor license in each state for the requirements everywhere else.

Who Licenses HVAC Work in Wyoming

Three layers of government touch an HVAC job in Wyoming, and none of them replaces the others. A fourth layer, the county or town building department, decides whether any of this applies at all outside an incorporated city.

What Wyoming Regulates at the State Level

The Department of Fire Prevention and Electrical Safety, inside the State Fire Marshal's Office in Cheyenne, runs the statewide electrical licensing ladder, covering 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 and no state gas fitter license.

The state does regulate the mechanical code itself. On June 28, 2024 Wyoming adopted the 2024 International Codes, including the 2024 International Mechanical Code and the 2024 International Fuel Gas Code, alongside the 2024 International Building, Fire and Existing Building Codes. The Department's adopted codes list now names the 2026 National Electrical Code for state jurisdiction.

Wyoming measures mechanical work against a state code with no licensing ladder attached. Cities fill that gap, each differently.

The State Credential for HVAC Wiring: LM-H

The Limited Technician classes sit on the State Fire Marshal's electrical licensing page. The HVAC class reads, 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)."

The statute gives the same scope. W.S. 35-9-123(a)(viii)(A) lets the chief electrical inspector issue a limited electrical contractor license for the installation, repair or remodel of HVAC systems limited to wiring on the load side of the equipment disconnect.

The scope limit matters as much as the license. LM-H lets a mechanical technician terminate and service the equipment they installed, and nothing more. Running the branch circuit and setting the disconnect itself is journeyman or master electrician work.

Four sibling classes sit alongside it in the same list.

The Department defines a Limited Technician as someone with 2 years, or 4,000 hours, of experience in the part of the electrical industry the license covers, proven by notarized employer letters, the Department's verification form, union letters or letters from other boards. Credit for time in an electrical school counts toward that total, up to two years or 4,000 hours, under W.S. 35-9-126(a).

A Limited Technician cannot work alone. The State Fire Marshal's page states that any technician performing low voltage work in Wyoming must be employed at all times by a Low Voltage/Limited Contractor who carries a current Wyoming license.

The Limited Contractor License Your HVAC Company May Need

If your HVAC company does its own equipment wiring in Wyoming, the company itself likely needs a Low Voltage/Limited Electrical Contractor license. It must actively employ, in a full time capacity, a Wyoming licensed technician, journeyman or master electrician to serve as the technician of record, and a technician of record can only be the technician of record for one company.

The statute adds a detail the Department's page leaves out. Under W.S. 35-9-125(c) the applicant must be, or must actively employ in a full time capacity, the licensed limited technician of record, so an owner who holds the LM-H card can qualify their own firm. The same subsection waives the limited contractor license fee for a limited contractor who employs no technicians or apprentice technicians other than themselves. That matters for a one person LM-H shop: if you are the only technician and never hire another, Wyoming does not charge you for the Low Voltage/Limited Contractor license itself, though the $100.00 Limited Technician fee still applies.

Technician licenses in Wyoming can only be obtained through examination. The renewal application appears in your eLicense portal account on April 1, and Department rule sets a 45 day window to renew before the applicant must pass the exam again.

Apprentice technicians must register with the Department and renew that registration every year. A low voltage or limited electrical contractor, not the apprentice, must notify the chief electrical inspector in writing, within 10 days, of the name, address and hire or termination date of each apprentice technician it employs, and under W.S. 35-9-127(b) one licensed technician may supervise only one apprentice technician at a time.

Temporary permits for a limited technician who has shown qualifying experience last no longer than 150 days, under W.S. 35-9-126(c).

Under W.S. 35-9-130 an individual violation is a misdemeanor carrying a fine up to $500 and up to six months in jail, or up to $1,000 for a corporation, with license revocation possible either way. Unlicensed installation work also draws a civil penalty under the same section: up to $500 for a first offense and up to $1,000 for any later offense within three months.

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, with a $1.00 minimum, applies to online payments. Verify current requirements with the Department at (307) 777-7288 before applying.

How to Pass the LM-H Exam

The LM-H test is ICC exam 600, the Wyoming Limited HVAC Technician exam, delivered through Pearson VUE. You apply to the Department first, since ICC only opens scheduling after the Department confirms your eligibility.

Notes:

• The HVAC equipment and motors area covers only the load side of the disconnect to the equipment or motor, the same boundary the LM-H license itself draws.
• References: the 2023 National Electrical Code and Ugly's Electrical References, per the bulletin published August 19, 2025.

The Department's adopted codes list now names the 2026 NEC for state jurisdiction, while the bulletin's references still print the 2023 NEC. Confirm the reference edition in the ICC exam catalog when you register, since a changed state adoption does not always reach the bulletin the same year.

Wait 24 to 48 hours after Department approval before scheduling, and allow up to five business days for each Department processing step.

Casper: One Mechanical Ladder

The City of Casper Community Development Department issues mechanical credentials through its Building Inspection Division.

Mechanical Apprentice. Covers heating, venting, air conditioning, refrigeration and associated sheet metal work, as an employee of a mechanical contractor. The card is issued to the contractor in the applicant's name and is valid only for the term of that employment.

Mechanical Journeyman. Requires a certificate of completion from a federally recognized mechanical apprenticeship, or four years of experience in a Casper licensed mechanical shop, plus proof of successful testing.

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

Mechanical Contractor. Authorizes the business to conduct heating, ventilation, air conditioning, refrigeration and associated sheet metal work. Every applicant must possess, or prove employment of, a full time licensed mechanical master.

Casper folds heating, ventilation, air conditioning, refrigeration and sheet metal into one Mechanical classification. Cheyenne splits several of those apart, covered in the next section. Casper accepts ICC G29-N or an equivalent for the Mechanical Master, and G31-N, G29-N or an equivalent for the Mechanical Journeyman.

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 gas appliances other than water heaters and boilers, which fall back to plumbing. It requires proof of employment of a full time licensed gas utility installer or master plumber.

Casper wants a complete application with notarized experience affidavits and proof of testing, reviewed by the Chief Building Official. Do not send payment with the application; once approved, the city asks for a certificate of insurance and the license fee before it issues the license.

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 Separate Licenses

The City of Cheyenne Contractor Licensing Regulations, revised March 10, 2026, split mechanical work across several Class C subcontractor licenses.

Two lines in those sections change how you staff a crew. Section 18.8 requires the Limited Electrical HVAC license before an HVAC licensee does electrical work on the load side of the disconnect, and Section 18.10 requires refrigeration applicants to submit current EPA Type II, Type III or Universal certification.

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

Cheyenne states its rule in Section 1.2.3: for plumbing, electrical, refrigeration and HVAC work, every employee on a job site must hold a master, journeyman or apprentice license, or be a qualified supervisor, and the contractor must employ someone who holds a master or qualified supervisor license in that trade. Every person on your Cheyenne HVAC job site needs a card, not just the lead tech.

Cheyenne experience requirements

Notes:

• Master craft employee (12.1.8): 4 years/8,000 hours as an apprentice or certified equivalent, plus 3 years/6,000 hours as a journeyman.
• Journeyman craft employee (12.1.9): 4 years/8,000 hours as a licensed apprentice or certified equivalent training.
• Residential Plumbing/Mechanical Journeyman (12.1.11): 2 years/4,000 hours as a licensed apprentice, residential work only, one to one apprentice ratio.
• Class C qualified supervisor (12.1.4): 3 years/6,000 hours of comprehensive experience and/or education.

No more than three plumbing or mechanical apprentices may work under one licensed journeyman or master. Apprentice supervision under Section 12.1.10 steps down from 100 percent in year one to 75, 50 and 25 percent in years two through four.

All hours need third party verification under Section 3.2.2. Applicants who do not supply it will not be considered by the Board for licensure.

Cheyenne fees and insurance

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. Exams come through the ICC, NICET, NASCLA or another Board approved agency, and you pay the testing agency directly.

Cheyenne renewal, reciprocity and temporary work

Licenses expire one year from the date of issue, with no grace period: a renewal not received before expiration means a new application, and a license more than 30 days expired needs proof of a current published examination. The city sends a renewal notice about 60 days before expiration, and the regulations set no continuing education requirement.

Limited electrical licensees must submit a copy of their valid state license to renew the city license, so your LM-H card and your Cheyenne card have to stay current together. On reciprocity, Section 3.3.2 lets the Board grant it with other jurisdictions as it sees fit, and Section 3.3.3 notes that the state statute allows reciprocity among Wyoming jurisdictions only, with the Board weighing those reciprocal licenses case by case.

A craft employee registered for a required exam may get a one time temporary work authorization under Section 3.9, lasting up to 30 days and extended once, only after a failed first attempt, never past 60 days total and never available to the contractor itself.

Cheyenne has also moved contractor licensing to an online portal. Every existing licensed company must register an account there, and each company must register its qualified supervisor in the same system before applying for permits.

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

Gillette, Laramie and Jackson

Beyond Casper and Cheyenne, three more Wyoming cities license HVAC or mechanical contractors, and Gillette and Jackson each name a master behind the company.

Gillette. HVAC contractors are Class D under the city's 2024 International Mechanical Code. Every HVAC technician is licensed individually, one master or journeyman may supervise three apprentices, and an HVAC Contractor may not perform gas pipefitter work under that license; a separate Class D Gas Pipefitter license covers it. The Class D application fee is $150, general liability is $300,000 per occurrence and $600,000 aggregate, licenses run one year, and a company has 60 days to name a new Master of Record if its current one leaves; call (307) 686-5260.

Laramie. Since 2021 the city has licensed trade contractors, including mechanical and refrigeration, along with every master, journeyman and apprentice. Licenses expire December 31, renewal opens November 15, and the 2024 ICC code cycle took effect September 1, 2024; call (307) 721-5271.

Jackson. The HVAC Contractor class includes gas piping for related equipment. The Master of Record first earns a Certificate of Qualification card, by ICC exam or by reciprocity with another Wyoming jurisdiction, and the town now issues and renews only Master COQ cards; apprentice and journeyman COQ cards are no longer required. The town accepts the ICC exam series that starts with G, based on the 2018 International Codes. Contractor licenses expire every December 31, COQ cards expire December 31 every three years with 6 hours of ICC accredited continuing education, and the town no longer licenses work in unincorporated Teton County.

Jackson's current insurance and bond requirements run through 2027, and the town now collects proof of both through its SmartGov portal at renewal rather than by mail or email. The town will not accept a contractor license application at all until the Master of Record's COQ card is approved and paid.

Outside these cities, county and town rules vary. Wyoming's electrical statutes apply statewide, so the LM-H and limited contractor rules follow your crew wherever it wires equipment.

The Federal Layer Nobody Can Waive

None of the above replaces EPA Section 608 certification. Technicians who maintain, service, repair or dispose of equipment that could release refrigerants need Type I for small appliances, Type II or Type III for high or low pressure appliances, or Universal certification, under the Clean Air Act. Type II excludes small appliances and motor vehicle air conditioners, and earning the Universal certification requires taking the core test as a proctored exam. The EPA states that Section 608 credentials do not expire.

Technicians often assume the EPA card 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, and neither one waives the other.

How to Get Licensed for HVAC Work in Wyoming, Step by Step

1. List every city and county you will work in. Each city licenses the trade separately.
2. Decide who does the equipment wiring. If your techs terminate HVAC equipment on the load side of the disconnect, each one needs an LM-H card and the company needs a Low Voltage/Limited Contractor license.
3. Document the hours. Collect notarized letters or the Department's work verification form for 4,000 hours of HVAC electrical experience, plus third party verification for any Cheyenne application.
4. Apply to the Department. Open an eLicense portal account, upload a government ID, and submit the technician exam application once verified.
5. Schedule and pass ICC exam 600. Wait 24 to 48 hours after approval, book through Pearson VUE, and upload your pass letter to the portal to be issued the LM-H license.
6. Name the technician of record and license the company. File the Low Voltage/Limited Contractor application with the Technician of Record form; the license runs to July 1.
7. Qualify each city license. Pass the city's ICC mechanical exams and name the full time master or qualified supervisor it requires.
8. Line up insurance and workers compensation. Meet each city's general liability minimum and get a Wyoming workers compensation letter of good standing.
9. Certify refrigerant handlers. Every technician who opens a refrigerant circuit needs the right EPA 608 type.
10. Calendar every renewal. State dates run to July 1; Cheyenne renews on the issue anniversary; Laramie and Jackson by December 31.

The Qualifier Rule Behind Every Company License

Wyoming has no state HVAC board, but every licensing body that publishes a qualifier rule for the trade ties the company license to a named, licensed individual. The pattern holds whether the license comes from the State Fire Marshal, a city building department or a city contractor licensing board.

The State Fire Marshal, for the limited contractor license: the company must actively employ, in a full time capacity, a Wyoming licensed technician, journeyman or master as technician of record, and a technician of record can only be the technician of record for one company. Under W.S. 35-9-125(c) the owner may fill that role personally if they hold the license.

Casper, for the Mechanical Contractor license: every applicant must possess, or prove 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."

Cheyenne Section 13.3 adds a condition none of the other rules on this page write down: a contractor license stays valid only if the named qualified supervisor or master is employed by the licensee in an active, full time capacity, and that employment is the qualified supervisor's or master's principal employment.

Section 13.1 limits a qualified supervisor to one contractor, except where the entities are wholly owned by the same individuals, and a violation puts every one of that person's qualified supervisor or master licenses into inactive status. 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 as a qualified supervisor, master, journeyman or apprentice.

Gillette and Jackson each require a Master of Record, in Gillette a full time employee or an owner.

Read together, the pattern is plain. If you hold the master credential yourself, you can qualify your own company.

If you do not, the company needs a licensed master or qualified supervisor on payroll as a genuine full time employee, and in Cheyenne that job must be their principal employment. A qualifying agent QUALIFIES the company: an owner or full time W-2 employee who actually supervises the work, never a side arrangement. See what a qualifying agent is and how to hire a qualifying agent, or go straight to our contractor qualifier services if you need someone placed now.

What Happens When Your Qualified Supervisor Leaves

Cheyenne's Section 13.3.1 sets a hard clock, and Gillette sets its own.

Notes:

• Cheyenne's extension applies only for extreme extenuating circumstances, per Section 13.3.1.
• During any Cheyenne relief period, companies cannot apply for new permits without first meeting with the Board or providing an approved replacement qualified supervisor.

For an HVAC company mid season, a permit freeze stops change outs and new construction while crews stay on payroll.

How Much Does It Cost?

The license fees themselves are small. A Casper mechanical master card is $75.00, the Casper mechanical contractor license is $300.00 new and $150.00 to renew, a Cheyenne Class C1 is a $50.00 application plus $200.00 initial, and the state Low Voltage/Limited Contractor license is $200.00. Add the $100.00 LM-H card, the $115 ICC exam 600, the ICC mechanical exams, general liability at the minimums above, and workers compensation. A company chasing HVAC work in both Casper and Cheyenne is paying two full fee schedules and carrying two certificates of insurance, even though the crew and the equipment on the truck are the same.

The cost that decides your timeline is the experience ladder. Casper's mechanical master route wants four years of apprenticeship or equivalent plus five years as a journeyman or master, both in Casper licensed shops, and 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 contractor license, the scope and risk of the work, how many licenses have to be held at once, and how quickly you need to pull permits. Because that varies so much, call 615-219-2110 or start at hire a qualifying agent to scope your specific engagement.

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, so the trade itself is licensed by cities. The state does issue the LM-H Limited Technician license for electrical work on HVAC systems on the load side of the equipment disconnect.

What is an LM-H license in Wyoming? LM-H is a Limited Technician class issued by the Department of Fire Prevention and Electrical Safety for limited electrical work on HVAC systems, limited to electrical work on the load side of the equipment disconnect. It requires 4,000 hours and a passing score on ICC exam 600. The technician must be employed at all times by a licensed Low Voltage/Limited Contractor.

How do I get an LM-H license? Document 4,000 hours, apply through the State Fire Marshal's eLicense portal, and pass ICC exam 600 at Pearson VUE. The license is $100.00 for three years.

Which Wyoming cities license HVAC contractors? Casper, Cheyenne, Gillette, Laramie and Jackson all license HVAC or mechanical contractors, each with its own exams and fees. Check every city where you plan to work.

Do I need an EPA 608 certification in Wyoming? Yes, if you service or dispose of equipment that could release refrigerant. Section 608 is federal, applies in every state, and does not replace a city contractor license.

Can I run an HVAC company in Wyoming without a master license? Not in Casper, Cheyenne, Gillette or Jackson unless a licensed master or qualified supervisor stands behind the company, and Cheyenne requires that job to be their principal employment. If you do not hold the credential yourself, employing a licensed master as a full time W-2 qualifier is the lawful route; see how to hire a qualifying agent.

Does an apprentice technician have 10 days to get licensed? No. The 10 day window in W.S. 35-9-127(b) is the contractor's deadline to notify the chief electrical inspector, in writing, of an apprentice technician's hiring or termination. Apprentice technicians register with the Department and renew that registration yearly, and a licensed technician may supervise only one apprentice technician at a time.

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, and refrigeration applicants must show EPA Type II, Type III or Universal certification. In Casper both fall under the single Mechanical classification, along with sheet metal work.

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. Cities adopt their own editions by ordinance, so confirm the edition enforced where the work is.

Do I need a license for HVAC work in a Wyoming county with no city license? The state electrical rules apply everywhere in Wyoming, so equipment wiring still needs an LM-H technician working for a licensed limited contractor. Mechanical licensing outside the cities varies, so call the county building office before you bid, for example in Lincoln County or unincorporated Teton County.

Does Cheyenne require an online account to apply for a license? Yes. Cheyenne has moved contractor licensing to an online portal, and every licensed company must register an account and register its qualified supervisor there before applying for permits.

Does the LM-H license let me run the branch circuit or set the disconnect? No. LM-H covers only wiring on the load side of the equipment disconnect, the run between the disconnect and the HVAC unit itself. Running the branch circuit to the disconnect, or setting the disconnect, is journeyman or master electrician work, licensed separately under Wyoming's electrical statutes.

What is a technician of record in Wyoming? The Wyoming licensed technician, journeyman or master electrician that a Low Voltage/Limited Contractor must employ full time to hold its license. A technician of record can serve only one company at a time, though an owner who holds the license can fill the role for their own firm.

Bottom Line

Wyoming licenses HVAC wiring through the state LM-H card and leaves the mechanical trade to cities: Casper puts heating, cooling, refrigeration and sheet metal under one Mechanical ladder, while Cheyenne splits HVAC and refrigeration into separate tested licenses. Wherever a qualifier rule is published, the same pattern repeats: a named, licensed individual stands behind the company license, and in Cheyenne that job must be the qualifier's principal employment.

Wyoming's plumbing trade runs on the same municipal model with the same full time master rule, covered in plumbing license Wyoming. Wyoming licenses the electrical trade statewide, and that is where LM-H lives: see electrician license Wyoming. For neighboring states, compare HVAC license South Dakota and HVAC license Montana, read the national picture in how to get an HVAC contractor license, or compare requirements on our states overview.

Talk to The Licensing Company

If you are ready to run a Wyoming HVAC company before you personally hold a master credential, The Licensing Company, led by contractor licensing authorities Marshall Schofield and Jeremiah Jaskulski, places licensed masters as full time W-2 qualifying agents so your business can hold its licenses and keep pulling permits. We provide licensing services in all 50 states, so call 615-219-2110 to talk through the cities you need, or start at hire a qualifying agent.

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.

Sources

All sources retrieved 2026-10-17.

• Wyoming State Fire Marshal, Electrical Licensing, retrieved 2026-10-17
• Wyoming State Fire Marshal, Wiring Permits and Adopted Codes, retrieved 2026-10-17
• Wyoming State Fire Marshal, Rules and Statutes, retrieved 2026-10-17
• Wyoming Legislature, Wyoming Statutes Title 35 (W.S. 35-9-120 to 35-9-130), retrieved 2026-10-17
• International Code Council, Wyoming Electrical Contractor/Trades Examination Information Bulletin (August 19, 2025), retrieved 2026-10-17
• City of Casper, Plumbing, Mechanical and Individual Contractor Licenses, retrieved 2026-10-17
• City of Casper, Contractor Licensing, retrieved 2026-10-17
• City of Cheyenne, Contractor Licensing Regulations, Rev 03/10/2026, retrieved 2026-10-17
• City of Gillette, Contractor License Application (New), 6/25/2026, retrieved 2026-10-17
• City of Laramie, Contractor Licensing, retrieved 2026-10-17
• Town of Jackson, Contractor Licensing, retrieved 2026-10-17
• U.S. EPA, Section 608 Technician Certification Requirements, retrieved 2026-10-17

Last reviewed October 2026.