HVAC licensing in New Hampshire

New Hampshire licenses by fuel and equipment type, not 'HVAC' — and the coverage question is settled both ways it can be: pure air-conditioning and refrigeration work requires NO New Hampshire state license. The licensed territory is FUEL GAS work. Two doors exist for licensed gas fitters from elsewhere, both conditional:

RSA 153 mutual reciprocity agreements with states that reciprocate for New Hampshire, and an endorsement rule that issues a license on out-of-state evidence — PROVIDED the home state grants New Hampshire licensees the same privilege. Both hinge on mutuality; next door, nothing here is unilateral.

Partially established, tier-scoped: the FUEL GAS FITTING TRAINEE license is the lawful work-while-qualifying lane — defined as anyone 'engaged in the process of meeting the licensing requirements' under licensed-fitter supervision. No provision covers unlicensed work while a full FITTER application is pending. On the cooling side nothing is ever pending, because nothing is licensed.

Gas-fitter exams book through Advanced Trade School, (603) 785-2491. One burden worth knowing before applying: applicants with a felony, an offense against another person, or any dishonesty offense must submit a current NH criminal records check with the application. Your personal floor is EPA 608.

The Fuel Gas Fitting Trainee is a real licensed entry tier (a domestic-appliance trainee tier also exists) — supervised piping, heating, hot-water and hearth work while qualifying. Fees and terms were not captured; ask OPLC when budgeting.

The state scheme governs the licensed territory statewide.

Know the fuel line: gas work runs through OPLC's Mechanical Safety & Licensing tiers; straight cooling work is unlicensed territory where EPA 608 is the whole personal picture.