No: Wyoming does not issue a state HVAC license.
The state's trade-licensing agency, the Department of Fire Prevention and Electrical Safety, licenses electricians and runs no HVAC program, so mechanical trade licensing happens city by city.
Casper licenses Mechanical Apprentice, Journeyman, Master and Contractor for HVAC, refrigeration and associated sheet-metal work; Cheyenne's Contractor Licensing Board runs its own craft licences.
One federal rule applies everywhere: EPA 608 certification for refrigerant work.
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At a glance
No. Wyoming issues no state HVAC licence; the state's trade-licensing agency licenses electricians and runs no HVAC licence program, and mechanical trade licensing is city by city.
The city where the work is done.
Our research verified Casper's individual-contractor licensing program and Cheyenne's Contractor Licensing Board.
In Casper: Mechanical Apprentice, Mechanical Journeyman, Mechanical Master and Mechanical Contractor, covering HVAC, refrigeration and associated sheet-metal work.
Cheyenne licenses craft employees and qualified supervisors through its Contractor Licensing Board.
Casper Mechanical Journeyman: a federally recognized mechanical apprenticeship certificate or four years in a Casper-licensed mechanical shop.
Cheyenne journeyman-level craft licences: 4 years / 8,000 hours of documented experience as a licensed apprentice, or certified equivalent training.
An approved exam is part of Casper's journeyman requirement (ICC G31-N, G29-N or equivalent).
Cheyenne's Contractor Licensing Board sets the exam requirements for its mechanical licences, administered by ICC, the City, NICET and others.
Cheyenne's licences renew annually.
Our research did not confirm a continuing-education requirement for either city's mechanical licences β ask the city that issued yours.
Not established in our research.
We found no reciprocity agreement for Wyoming HVAC or mechanical licences in the sources we checked; ask the city where you will work what it accepts.
None statewide.
Licences are kept by the cities β verify with the building or licensing department where the work is done.
Casper's entry licence for someone learning HVAC, refrigeration or associated sheet-metal work; it is issued to the employing contractor in the apprentice's name and is valid only while the apprentice works for that contractor.
Casper's worker licence for the mechanical trades; it takes a federally recognized mechanical apprenticeship certificate or four years in a Casper-licensed mechanical shop, plus an approved exam (ICC G31-N, G29-N or equivalent).
The top individual credential in Casper's Mechanical licence list, and the one a Casper Mechanical Contractor must have full-time.
Casper's business licence to conduct heating, ventilation, air conditioning, refrigeration and associated sheet-metal work.
No. Wyoming issues no state HVAC licence.
The state's trade-licensing agency, the Department of Fire Prevention and Electrical Safety (the State Fire Marshal), licenses electricians; our research found no HVAC licence program there, and that absence is inferred from the department's own site, which offers electrical licensing and permits only.
Cross-state research places Wyoming among the states with no state HVAC licence at all, with licensing, if any, left to cities and counties.
The same is true at the contractor level: we found no state HVAC contractor licence β an absence inferred rather than stated by a state source, so confirm with the city; contractor licensing is municipal.
What applies everywhere is federal: under 40 CFR 82.161, anyone who could reasonably be expected to violate the integrity of a refrigerant circuit while maintaining, servicing, repairing or disposing of appliances with CFC/HCFC or non-exempt substitute refrigerants must pass an exam from an EPA-approved technician certification program.
The clearest ladder is Casper's.
The city licenses four mechanical credentials covering heating, ventilation, air conditioning, refrigeration and associated sheet-metal work: Mechanical Apprentice, Mechanical Journeyman, Mechanical Master and Mechanical Contractor.
The apprentice licence is issued to the employing contractor in the apprentice's name and is valid only while the apprentice works for that contractor.
The Mechanical Journeyman is the licence a worker qualifies for through the experience and exam set out below; the Mechanical Master is the credential a Casper Mechanical Contractor must have full-time.
The contractor licence is the business licence β it authorizes the business to conduct, carry on or engage in heating, ventilation, air conditioning, refrigeration and associated sheet-metal work.
Cheyenne works differently: its Contractor Licensing Board licenses qualified supervisors and journeyman-level craft employees in the mechanical trades, and it will not issue a contractor licence until a certificate of insurance has been filed with and approved by the board.
βauthorizes the contractor to conduct, carry on or engage in the business of heating, ventilation, air conditioning, refrigeration and associated sheet metal work.β
Casper's Mechanical Journeyman requires either a federally recognized mechanical apprenticeship certificate or four years' experience in a Casper-licensed mechanical shop, plus an approved exam β International Code Council G31-N, G29-N or equivalent.
Casper's listed fees (first column) are: mechanical/plumbing contractor $300, master $75, journeyman $25, apprentice $3.
The same table shows a second, unlabelled column ($150.00 next to the contractor's $300.00) that our research could not tie to a fee type, so ask the city which applies before you pay.
In Cheyenne, a journeyman-level craft licence requires at least 4 years / 8,000 hours of documented experience as a licensed apprentice, or certified equivalent training, plus a satisfactory exam.
Cheyenne's fees: journeyman $50 application, $30 initial licence and $15 renewal; master/qualified supervisor $50/$50/$25.
βJourneyman level craft employee. At least four (4) years with eight thousand (8,000) hours documented experience, in the trade, as a licensed apprenticeβ
There is no state exam, because there is no state licence.
In Casper, the Mechanical Journeyman requirement names an approved exam: International Code Council G31-N, G29-N or an equivalent.
In Cheyenne, the Contractor Licensing Board determines the examination requirements for its qualified supervisor, plumbing and mechanical licences, and its regulations list ICC, the City, NICET and others as administrators.
What the exams actually cover β content outlines, passing scores, scheduling β is not established in our research, so get the current exam requirement from the city where you will apply.
βExamination requirements for qualified supervisors, plumbing, and mechanical licenses shall be determined by the Board.β
The renewal cycle our research confirmed is Cheyenne's: licences under its Contractor Licensing Board renew annually, with journeyman renewal at $15 and master/qualified supervisor renewal at $25.
Casper's renewal cycle and fee did not come through clearly β the city's fee table shows a second, unlabelled column our research could not tie to a fee type β so ask Casper directly which amount is the renewal.
Continuing education: our research did not confirm any CE hour requirement for either city's mechanical licences.
That is a gap in the research, not a confirmed zero, so check with the city that issued your licence before it expires.
We found no reciprocity agreement for Wyoming HVAC or mechanical licences in the sources we checked, and our research did not confirm how Casper or Cheyenne treats an out-of-state licence or out-of-state experience.
Because the licences are city-issued, each city's rules govern inside its own limits; the building or licensing department where you will work can tell you what it accepts before you take a job there.
One requirement is not local: the EPA 608 certification requirement comes from the federal rule 40 CFR 82.161, not from any city or state, so it applies the same wherever in the country you work.
There is no statewide HVAC licence lookup in Wyoming.
Licensing is local, so verifying a licence means contacting the city: Casper's individual contractor licensing requirements are published on the city's website, and Cheyenne's sit with its Contractor Licensing Board.
The state's Department of Fire Prevention and Electrical Safety licenses electricians and runs no HVAC licence program, so there is nothing HVAC-related to search there.
If you are hiring or subcontracting, ask for the licence and confirm it with the building or licensing department where the work will be done before work starts.
The programs our research verified are Casper's and Cheyenne's.
Casper licenses individual mechanical apprentices, journeymen, masters and contractors for HVAC, refrigeration and associated sheet-metal work.
Cheyenne's Contractor Licensing Board sets exam requirements for its mechanical and qualified supervisor licences, requires at least 4 years / 8,000 hours of documented apprentice experience (or certified equivalent training) for journeyman-level craft licences, will not issue a contractor licence until a certificate of insurance is filed with and approved by the board, and renews its licences yearly.
Our research also lists Laramie among the cities said to run their own trade-licence programs, though no state source states that outright, so treat the city list as a starting point rather than a complete one.
Other Wyoming cities and counties may add their own mechanical requirements or permits; the building or licensing department where the work is done is the authority, and it can tell you what it requires.
This page summarizes the Wyoming board pages, statutes, rules and other sources listed below, as read for this state-by-state HVAC licensing series, current as of September 2026.
It is not a substitute for the instructions the city or county building department publishes.
For the rest of the picture in Wyoming, see plumbing licensing in Wyoming, HVAC apprenticeships in Wyoming, HVAC contractor licensing in Wyoming, and hvac technician pay in Wyoming.
Not a state one.
Wyoming issues no state HVAC licence, and the state's trade-licensing agency, the Department of Fire Prevention and Electrical Safety, licenses electricians and runs no HVAC licence program.
Whether you need a licence depends on the city where you work: Casper licenses Mechanical Apprentice, Journeyman, Master and Contractor for HVAC, refrigeration and associated sheet-metal work, and Cheyenne's Contractor Licensing Board licenses craft employees and qualified supervisors.
Ask the building or licensing department where the work will be done.
Federal EPA 608 certification applies to refrigerant work everywhere.
Not statewide.
The journeyman credential our research verified is Casper's Mechanical Journeyman licence, which takes a federally recognized mechanical apprenticeship certificate or four years in a Casper-licensed mechanical shop, plus an approved exam (ICC G31-N, G29-N or equivalent).
Cheyenne licenses journeyman-level craft employees with at least 4 years / 8,000 hours of documented experience as a licensed apprentice, or certified equivalent training, plus a satisfactory exam.
Other cities set their own terms.
It depends on the city.
Casper's listed fees are $300 for a mechanical/plumbing contractor, $75 for a master, $25 for a journeyman and $3 for an apprentice; the city's table also shows a second, unlabelled column our research could not confirm, so ask which applies.
Cheyenne journeymen pay $50 to apply, $30 for the initial licence and $15 to renew; master and qualified supervisor licences run $50/$50/$25.
We found no reciprocity agreement for Wyoming HVAC or mechanical licences in the sources we checked.
Licences are issued by cities, so each city's own rules govern inside its limits, and our research did not confirm how Casper or Cheyenne treats an out-of-state licence or out-of-state experience.
Ask the building or licensing department where you will work before you take a job there.
Yes, for refrigerant work β everywhere in the United States, not just Wyoming.
Under 40 CFR 82.161, anyone who could reasonably be expected to violate the integrity of a refrigerant circuit while maintaining, servicing, repairing or disposing of appliances with CFC/HCFC or non-exempt substitute refrigerants must pass an exam from an EPA-approved technician certification program.
It is a federal requirement, separate from any city licence.
Sources
Sourced from the documents listed above.
Verified September 2026.
This is career information, not legal advice.
Confirm current rules with the city or county building department.