HVAC licensing in Connecticut

Connecticut holds no reciprocal agreements with anyone — but runs a QUANTIFIED equivalency door, and the numbers are published: an out-of-state license qualifies if it required the same classroom hours, equivalent curriculum, and the same OJT hours as the Connecticut class you want — for the unlimited S-2 journeyperson, that means 576 classroom hours and 8,000 OJT hours.

The process is documentary: your license, a license verification, THE OTHER STATE'S LAWS AND REGULATIONS proving the requirements, and scope-of-work documentation — and the application shouts its own rule: submit documents for ONE out-of-state license only, because only one will be reviewed.

Not established for the licensed classes — no work-while-pending provision was found. The APPRENTICE registration is the lawful work-while-training lane: register, work supervised, bank hours.

Twenty-one classes in contractor/journeyperson pairs (odd numbers contract, even numbers work): S-1/S-2 is the unlimited heating-piping-cooling pair, with limited families (B, D, and more) scoping narrower work on shorter hour ladders — DCP publishes a per-class equivalency chart. The S-2 standard is a registered apprenticeship or its equivalent: 576 classroom + 8,000 OJT. Your personal floor is EPA 608.

The registered apprenticeship IS the S-2 route — 576 classroom and 8,000 OJT hours through CT DOL registered apprenticeship, or accepted equivalent experience and training. The limited classes offer shorter ladders.

The state class system governs statewide — no municipal HVAC card exists in Connecticut.

Pairs, by design: the odd-numbered class contracts, the even-numbered class works. A traveler joining a crew needs the journeyperson class covering the work (S-2 unlimited, or the right limited class); the employer holds the contractor class. Match the class number to the scope before assuming any card covers the job.