Colorado to Massachusetts: master HVAC technician license reciprocity
Colorado does not issue a statewide master HVAC technician license, so there is nothing to transfer. Here is Massachusetts's standard path for out-of-state applicants.
Your origin state does not issue a statewide license at this level, so there is no license to transfer. The destination's standard out-of-state path is shown; expect to meet it in full.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Refrigeration Contractor by examination with out-of-state license credit (all states)
Your out-of-state credentials give no advantage. You meet the destination's requirements from scratch.
A master HVAC technician or HVAC/refrigeration contractor licensed in any other state applies to OPSI for the Refrigeration Contractor examination online through the My License portal or by mail. The Massachusetts prerequisites are 2,000 hours held and used under a Massachusetts Refrigeration Technician license plus 100 hours of post-apprenticeship refrigeration training at an approved school; the application form lets the applicant instead certify 'I held and used a refrigeration license in another jurisdiction for not less than 2000 hours' and that the 100 hours of additional training were taken at an institution in another jurisdiction, with employer and school documentation, and states that such an application may be forwarded to the Bureau, which may allow the candidate to sit for the examination. Under 528 CMR 11.07(1) the Bureau decides whether the out-of-state license and its underlying experience and education are substantially equivalent and may grant partial credit or deny the petition. The applicant also submits proof of age (18+) and a 2x2 photo with the $150 non-refundable fee, is notified about four to eight weeks after receipt, and must pass the contractor exam at 70% (a failing candidate reapplies). The exam is not waived for any state because the Bureau has no reciprocity agreement; the license renews for $75.
528 CMR 11.03 states the master prerequisite as 2,000 hours 'as a Massachusetts Journeyman Refrigeration Technician', while the Bureau's own contractor application accepts 2,000 hours under a refrigeration license from another jurisdiction if the Bureau agrees; the form governs in practice but the outcome is at the Bureau's discretion. The Bureau's published materials do not say whether it may instead require the applicant to obtain the Massachusetts Refrigeration Technician license first. No separate business or law examination is published for this license. The contractor how-to page and form list only the $150 application fee; no separate exam fee or initial license fee is published.
At a glance
- Trade exam
- Required
- Law / code exam
- Not required
- Out-of-state hours
- Count toward eligibility
What you must already have
- Your Colorado license must be active and in good standing.
- You must document at least 2,000 hours of qualifying work experience.2,000 hours held and used under a refrigeration technician-level license, documented by the employer; out-of-state hours are subject to the Bureau's substantial-equivalence review (528 CMR 11.07).
- 100 hours of additional (post-apprenticeship) refrigeration training from an approved school, or an equivalent course at an institution in another jurisdiction, documented by the school
- At least 18 years of age; Bureau approval to sit for the examination on out-of-state credentials
What you'll do to get licensed in Massachusetts
- 1Application fee. Pay the application fee ($150). Non-refundable Refrigeration Contractor application fee, payable to the Commonwealth of Massachusetts (Valor Act reductions for military).
- 2Other. Employer documentation of the 2,000 hours, school documentation of the 100-hour training, proof of age and a 2x2 passport-style photo (or RMV photo release).
- 3Trade exam. Pass the destination's trade exam. Massachusetts Refrigeration Contractor (Master Refrigeration Technician) examination administered by OPSI; 70% or better required; a failing candidate must reapply.
- 4Other. EPA Section 608 technician certification (Universal) to handle refrigerants; required of every Massachusetts refrigeration technician under 528 CMR 11.03 and federal law; does not expire.
Published fees on this path total $150, excluding exam-vendor fees, bonds, and insurance.
What you'll need to buy or arrange
Exam preparation
Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.
- Trade exam
- Other
How Massachusetts licenses master HVAC technicians
Massachusetts master HVAC technician · “Refrigeration Contractor (Master Refrigeration Technician)”
Statewide license
Massachusetts' highest personal HVAC-type credential is the Refrigeration Contractor license, which M.G.L. c. 146, § 81 calls the 'master refrigeration technician' and 528 CMR 11.03 the 'Master Refrigeration Technician/Contractor'. It is issued by the Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters (OPSI) to an individual who has held and used a Massachusetts Refrigeration Technician license for at least 2,000 hours and completed 100 hours of additional Bureau-approved refrigeration training; it allows the holder to establish a refrigeration business and employ licensed technicians and apprentices, and the license number must appear on vehicles and invoices. The applicant pays a $150 non-refundable application fee and must pass the OPSI contractor exam at 70%; the license renews for $75. There is no general HVAC or mechanical contractor license in Massachusetts; hydronic heating contractors hold a Master Pipefitter license and oil-burner firms are certified by the Department of Fire Services. The contractor application lets an out-of-state applicant substitute 2,000 hours under a refrigeration license held in another jurisdiction and 100 hours of training taken elsewhere, subject to the Bureau agreeing to let the candidate sit the exam; the exam itself is never waived because the Bureau has no reciprocity agreements.
Why Colorado has nothing to transfer
Colorado master HVAC technician
Licensed by cities and counties
Colorado issues no state master HVAC, mechanical or contractor license; the state licenses only electricians and plumbers, and mechanical licensing is left entirely to cities, counties and regional building departments. The master-level credential is therefore a local supervisor certificate or mechanical contractor license. Denver issues person-held Heating and Ventilating Class A and Class B and Refrigeration Class A and Class B supervisor certificates (6 to 8 years of experience plus the ICC F29 Master Mechanical or F32 Residential Mechanical exam, $60 for three years) and then licenses the mechanical contractor that employs the certificate holder ($250 for three years). The Pikes Peak Regional Building Department licenses Mechanical Contractors in classes H-A commercial, H-B residential and H-C specialty classes on the ICC W29 Master Mechanical, W32 Residential Mechanical or N33 Master Gas Pipe Fitter exams ($100 per license plus a $50 application fee). Neither jurisdiction recognizes out-of-state licenses: Denver does not reciprocate certificates from other counties or states and PPRBD accepts no out-of-state exams, so an arriving master HVAC contractor documents experience locally and passes the ICC exam required by each jurisdiction where they will pull permits.
How local licensing works in Colorado
How local licensing works. With no state mechanical license, each Colorado jurisdiction licenses mechanical contractors under its own code, nearly always on ICC National Standard exams (Pearson VUE, $100 each). PPRBD's notice says that 'often, contractors who work in several areas must pass an exam in each jurisdiction,' although many jurisdictions honor the same ICC certificate.
Denver. Licensing is a two-step process. First the individual obtains a supervisor certificate: Heating and Ventilating Class A (commercial and residential heating, ventilation and cooling up to 50 tons; 8 years of experience, 4 as a journeyman and 4 in design or supervision; ICC #F29 National Standard Master Mechanical), Heating and Ventilating Class B residential only (6 years; ICC #F32 National Standard Residential Mechanical), Heating, Ventilating, A/C residential only (6 years each in heating/ventilation and refrigeration; ICC #F32; refrigeration up to 5 tons), Refrigeration Class A (8 years; ICC #F29) or Refrigeration Class B residential only (6 years; ICC #F32). Experience is documented with notarized letters from employers or clients for projects completed within the last 10 years, and the ICC pass letter is due within 90 days of approval. Supervisor certificates cost $60 and renew every 3 years. Second, the business applies for a mechanical contractor license ($250, 3 years), which must be held by or employ a certificate holder. Denver 'does not accept or reciprocate contractor licenses and/or certificates from other counties or states.'
Colorado Springs and El Paso County (PPRBD). Mechanical Contractor licenses: H-A Mechanical Commercial (ICC W29 Master Mechanical), H-B Mechanical Residential (ICC W32 Residential Mechanical), H-C1 Gas Piping (ICC N33 Master Gas Pipe Fitter), H-C2 Commercial Refrigeration, H-C3 Residential Maintenance/Repair and H-C4 Residential Remodeling, each with a $100 license fee, plus a $50 application fee, references documenting relevant experience, a liability insurance certificate naming PPRBD (minimums in RBC201.7) and a name-based judicial record check; the Licensing Committee and Board of Review act on each application monthly. PPRBD accepts ICC National Standardized or ICC Colorado Standard exams passed on or after January 1, 2016 and 'no out-of-state exams will be accepted.'
Other jurisdictions. Only Denver and PPRBD were verified for this entry; other Colorado cities and counties license mechanical contractors under similar ICC-based ordinances and should be checked individually.
Out-of-state holders. No Colorado jurisdiction checked publishes reciprocity or endorsement for another state's master HVAC or mechanical contractor license. The practical route is to pass the ICC National Standard Master Mechanical (or Residential Mechanical) exam once and apply in each jurisdiction, each of which separately verifies experience.
Common questions
- Do I have to take the Massachusetts master HVAC technician exam if I'm licensed in Colorado?
- Yes. Massachusetts requires the trade exam on this path.
- What does it cost to get a Massachusetts master HVAC technician license from Colorado?
- Published fees on this path total $150, not counting exam vendor fees or bonds.
- Do my Colorado work hours count in Massachusetts?
- Yes. Documented out-of-state experience counts toward Massachusetts's eligibility requirements.
- Does it work the other way, from Massachusetts to Colorado?
- Not necessarily. Reciprocity is directed. Going from Massachusetts to Colorado, the mechanism is not applicable.
Sources
- EPA Section 608 Technician Certification Requirements · 40 CFR Part 82, Subpart F (Clean Air Act §608) · U.S. Environmental Protection Agency · Other · verified September 15, 2026
- 528 CMR 11.00 - Prerequisites for Examinations for Pipefitters, Refrigeration Technicians and Sprinkler Fitters (Mass. Register #1534, 11/08/2024) · 528 CMR 11.03, 11.07 · Massachusetts Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters · Admin Rule · verified September 23, 2026
- Mass.gov - Apply for an Oil Burner Technician or Apprentice Certificate (Department of Fire Services) · 527 CMR 1.00 · Massachusetts Department of Fire Services · Agency Page · verified September 15, 2026
- MGL Chapter 146, Section 81 - Definitions (pipefitters, refrigeration technicians, sprinkler fitters) · M.G.L. c. 146, § 81 · Massachusetts General Court · Statute · verified September 23, 2026
- MGL Chapter 146, Section 85 - Applications for licenses; fees; expiration · M.G.L. c. 146, § 85 · Massachusetts General Court · Statute · verified September 23, 2026
- MGL Chapter 146, Section 86 - Classification and limitation of refrigeration licenses · M.G.L. c. 146, § 86 · Massachusetts General Court · Statute · verified September 23, 2026
- Mass.gov - Apply for a Refrigeration Contractor License · Massachusetts Office of Public Safety and Inspections · Agency Page · verified September 23, 2026
- Mass.gov - Bureau of Pipefitters, Refrigeration Technicians, and Sprinkler Fitters · Massachusetts Office of Public Safety and Inspections, Division of Occupational Licensure · Agency Page · verified September 15, 2026
- Mass.gov - Apply for or Renew a Pipefitters, Refrigeration Technician or Sprinkler Fitters License · Massachusetts Office of Public Safety and Inspections · Agency Page · verified September 15, 2026
- Massachusetts OPSI - Refrigeration Contractor Application (form) · Massachusetts Office of Public Safety and Inspections · Form · verified September 23, 2026
- Mass.gov - Renew your Pipefitter, Refrigeration Technician, or Sprinkler Fitter License · Massachusetts Office of Public Safety and Inspections · Agency Page · verified September 23, 2026
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.