How Do You Get an HVAC License in Massachusetts?

Not one license, no. Massachusetts has no single HVAC license: the state licenses HVAC work in pieces, through the Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters within the Office of Public Safety and Inspections (OPSI) for refrigeration, the Board of Examiners of Sheet Metal Workers for ductwork, and the Board of State Examiners of Plumbers and Gas Fitters for gas piping.

All three are statewide licenses, so which one you need depends on the work in front of you.

For refrigeration, the board's page is specific: the Refrigeration Technician license is required for anyone who performs refrigeration work having a capacity over 10 tons in the aggregate, and that same wording leaves smaller residential A/C — 10 tons or less in the aggregate — outside the license.

Beneath the state layer sits the federal one: 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 containing CFC/HCFC or non-exempt substitute refrigerants must pass an exam from an EPA-approved technician certification program — EPA 608 certification.

There is no single HVAC license with levels in Massachusetts; three boards license the pieces.

In the refrigeration track, the entry rung is the Refrigeration Apprentice license: an apprentice must be licensed with OPSI, hold a valid registration with the Division of Apprentice Standards (DAS), and be employed by a Massachusetts Refrigeration Contractor throughout the apprenticeship.

The Refrigeration Technician license is the worker-level license, required for anyone performing refrigeration work with a capacity over 10 tons in the aggregate.

For a business, the Refrigeration Contractor license allows the holder to have a regular place of business and to employ duly licensed people to perform refrigeration work.

Ductwork is the sheet metal board's territory: it licenses apprentice, journeyperson and master sheet metal workers plus the Sheet Metal Business License.

Gas piping belongs to the plumbing and gas board, and the border is hard: experience installing HVAC components for heating systems, steam piping and hydronic heat piping does not count as qualifying experience toward the journeyman plumber license.

The Refrigeration Technician exam application asks for documentation from your employer that you have worked not less than 6,000 hours in Massachusetts as a duly licensed OPSI Refrigeration Apprentice under a Massachusetts Refrigeration Contractor, not less than 450 hours of study at an approved school, a high school diploma or equivalent, and a copy of your Universal CFC (EPA 608) certification.

The application fee is $75.

The qualifying hours are earned on the apprentice license, so start there: the apprentice must be licensed with OPSI, registered with DAS, and employed by a Massachusetts Refrigeration Contractor throughout the apprenticeship.

At the business tier, the Refrigeration Contractor application requires 100 hours of additional refrigeration training from an approved school, an exam, and a $150 application fee.

OPSI runs the refrigeration exams itself.

After you apply, you receive a Notice to Appear by email with the date, time, and location of your examination; scores are posted on the OPSI website about a week later, and a candidate who fails must reapply.

The Refrigeration Contractor application includes an exam of its own.

Neither exam's content outline is described in the pages we researched, so check the candidate materials OPSI sends you.

Our research did not find a renewal cycle or a continuing-education requirement for the Massachusetts refrigeration licenses.

The board pages we researched describe how to earn the license, not what it takes to keep it, so renewal fees and CE hours for refrigeration technicians and contractors are an open question.

Ask OPSI's Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters what your renewal requires before your license lapses.

Our research did not find a reciprocity or out-of-state-license rule for the Massachusetts refrigeration licenses: none of the OPSI pages we researched says whether the Bureau accepts another state's refrigeration license, or credits refrigeration hours earned outside Massachusetts toward the 6,000-hour requirement.

Treat that as a gap in our research, not a no. If you hold an HVAC or refrigeration license from another state, ask the Bureau of Pipefitters, Refrigeration Technicians and Sprinkler Fitters how it is treated before you plan a move.

Our research did not find a license search dedicated to refrigeration licenses alone; the two lookups our research recorded are both on mass.gov.

Check an occupational board license covers the boards under the Division of Occupational Licensure, and the Division of Occupational Licensure check-a-license page covers OPSI licenses, refrigeration included.

Search a license before you accept a job with — or hire — a business that says it is licensed.

Effective November 9, 2026, new licensing requirements take effect for journeyman pipefitters and refrigeration technicians: all applicants must complete a Bureau-approved 450-hour course and at least 6,000 clock hours as a licensed apprentice.

The Bureau adopted the standardized pathway on November 8, 2024 in 528 CMR 11, with a hardship waiver available for the old pathway.

Pages written before the change may still describe older school-specific hour combinations, so check anything you read against the new rule.