Connecticut licenses both contractors and journeypersons through a structured S/D system, requiring an open-book exam with a 70% passing score. No continuing education is required and no reciprocity agreements exist with other states.
Completion of a registered apprenticeship program or equivalent experience and training. D-2 requires 432 hours of related instruction. S-2 requires equivalent combination of apprenticeship and experience.
Yes — 70 questions, multiple choice, open book, 3-hour time limit. 70% passing score. Separate exams for S and D license tracks.
None required for HVAC/heating/cooling licenses in Connecticut
None — Connecticut has no reciprocal agreements with any other state for HVAC/R or plumbing/gas-fitter licenses
Reciprocity agreements can change. Always verify current status directly with Connecticut Department of Consumer Protection before relying on reciprocity for licensure.
Connecticut's S/D licensing system provides clear journeyperson-to-contractor pathways. All licenses expire annually on August 31. Journeyperson renewal fee: $120/year. No continuing education or reciprocity is notable compared to neighboring states.
EPA 608 Certification — Required in All 50 States
Regardless of Connecticut's state licensing rules, any technician who purchases, handles, or works with regulated refrigerants must hold EPA Section 608 certification. This is a federal requirement under the Clean Air Act that no state law can waive. EPA 608 Universal (covering Type I, II, and III) is the most versatile credential for most HVAC roles.
Browse EPA 608 Universal jobs in ConnecticutConnecticut DCP administers open-book HVAC licensing exams with 70 multiple-choice questions, a 3-hour time limit, and a 70% passing score. Two separate exam tracks exist: the S track (S-1 Unlimited Contractor and S-2 Journeyperson) covers heating, piping, and cooling systems without size restriction, while the D track (D-1 Limited Contractor and D-2 Journeyperson) is restricted to warm air, air conditioning, and refrigeration. The open-book format means candidates can bring approved references, but efficient navigation under time pressure is essential. Connecticut has no reciprocity agreements with any other state.
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Last verified: 2026 · Always confirm current requirements with your state licensing board before starting work or submitting an application.
Connecticut Department of Consumer Protection (DCP) — License Services Division
Visit official board websiteApproximate first-attempt pass rate: ~67% first-attempt pass rate; the open-book format helps candidates who prepare their references thoroughly
