Connecticut · HVAC technician licensing · verified July 2026
Connecticut HVAC technician license requirements
The short answer
As of July 2026, Connecticut licenses HVAC work at the state level through the Department of Consumer Protection under its heating, piping, cooling and sheet metal licensing program, with both journeyperson and contractor tiers (e.g., S-2 unlimited journeyperson and S-1 unlimited contractor, D-2/D-1 for warm air/AC/refrigeration, B-2/B-1 for gas and oil burners). Journeyperson licenses require completion of a registered apprenticeship or equivalent documented hours; contractor licenses require 2+ years as a licensed journeyperson. All licenses expire annually on August 31.
Do you need a license to work as an HVAC technician in Connecticut?
Connecticut licenses HVAC technicians statewide, so one credential is valid across the whole state.
Additional limited tiers exist (S-3/S-4, S-7/S-8, S-9/S-10 limited heating/cooling, D-3/D-4 limited cooling, G-1/G-2 gas piping, OE-2 operating engineer, PP-1/PP-2 process piping). Only individuals may hold licenses (no company applications). DCP states Connecticut has no reciprocal agreements with other jurisdictions, but an equivalent out-of-state license application path exists. Federal EPA Section 608 refrigerant certification is additionally required for refrigerant handling. Exam fees are paid separately to the exam vendor (PSI).
What licenses does Connecticut issue?
The Connecticut Department of Consumer Protection - Occupational and Professional Licensing (Heating, Piping, Cooling and Sheet Metal Work) issues the credentials below for this trade. Boards often list further classes for specialties and business licenses; these are the ones this page covers.
Hours are what each class asks for on its own terms. Where a senior class shows fewer than a journeyman, the board is counting time served after the earlier license rather than from the start; the prerequisite column says which.
| License | On-the-job hours | Classroom hours | Exam |
|---|---|---|---|
| S-1 Unlimited Heating, Piping and Cooling Contractor | not published | not published | Yes |
| S-2 Unlimited Heating, Piping and Cooling Journeyperson | 8,000 | 576 | Yes |
| D-1 Limited Warm Air, Air Conditioning and Refrigeration Contractor | not published | not published | Yes |
| D-2 Limited Warm Air, Air Conditioning and Refrigeration Journeyperson | 4,000 | 432 | Yes |
| B-1 Limited Gas and Oil Burner Contractor | not published | not published | Yes |
| B-2 Limited Gas and Oil Burner Journeyperson | 2,000 | 288 | Yes |
| B-4 Limited Gas and Oil Burner Journeyperson (any size) | 4,000 | 360 | Yes |
| S-4 Limited Heating, Cooling and Piping Journeyperson | 8,000 | 576 | Yes |
Source: Connecticut Department of Consumer Protection - Occupational and Professional Licensing (Heating, Piping, Cooling and Sheet Metal Work) (portal.ct.gov). Verified July 2026.
S-2 Unlimited Heating, Piping and Cooling Journeyperson: Completion of a registered apprenticeship or equivalent experience and training
D-2 Limited Warm Air, Air Conditioning and Refrigeration Journeyperson: Registered apprenticeship or equivalent experience and training
B-2 Limited Gas and Oil Burner Journeyperson: Registered apprenticeship or equivalent experience and training
B-4 Limited Gas and Oil Burner Journeyperson (any size): Registered apprenticeship or equivalent experience and training
S-4 Limited Heating, Cooling and Piping Journeyperson: Registered apprenticeship or equivalent experience and training
How many hours do you need in Connecticut?
Connecticut requires 8,000 hours of on-the-job experience for a S-2 Unlimited Heating, Piping and Cooling Journeyperson HVAC technician license, plus 576 classroom hours. At a 40-hour week the on-the-job portion is roughly 4 years of full-time work.
What exam does Connecticut require?
Trade exam for each license type (e.g., S-1/S-2, D-1/D-2, B-1/B-2). Administered by PSI Examination Services (under contract with the Department of Consumer Protection).
How much does a Connecticut HVAC technician license cost?
Getting a S-2 Unlimited Heating, Piping and Cooling Journeyperson HVAC technician license in Connecticut costs $90 in board fees, before any training. That is the application fee charged once, with renewal charged separately below. No board publishes this total, so it is added up here from the schedule it does publish. An exam is required and its fee is not in that figure, because no amount for it appears in the board material this page is built from. Check the board's current fee schedule before budgeting.
- Application fee$90
- Renewal fee (recurring)$120
How often do you renew, and what continuing education is required?
Renewal period: 1 year, all heating, cooling and sheet metal licenses expire annually on August 31
How does the apprenticeship route work?
The standard path is a Connecticut Department of Labor registered apprenticeship; completing it qualifies you to sit for the journeyperson exam. Equivalency is allowed with documented hours (e.g., S-2: 8,000 on-the-job + 576 classroom hours; D-2: 4,000 + 432; B-2: 2,000 + 288). DCP states classroom hours are mandatory, on-the-job experience cannot substitute for the classroom requirement. After 2+ years as a licensed journeyperson you may apply for the corresponding contractor license.
Which states does Connecticut have license reciprocity with?
Connecticut's own board publishes no reciprocity agreements and takes out-of-state licensees through an endorsement or equivalency review instead. 1 other state names Connecticut in their agreements, so the route in the other direction may exist: Nevada. Each of those boards decides its own case.
How does Connecticut compare to neighboring states?
Requirements stop at the state line, which matters if you live near one or expect to move. Here is what the neighboring states ask of the same trade.
| State | Journeyman hours | Licensing model |
|---|---|---|
| Connecticut | 8,000 | Statewide |
| Massachusetts | not published | Statewide |
| Rhode Island | 10,000 | Statewide |
Source: state licensing boards. Verified July 2026.
How does Connecticut compare nationally?
6 states publish an explicit hour figure for this trade, and they range from 3,000 to 10,000 hours. Connecticut's 8,000 hours is what 2 of them ask, making it the standard rather than an outlier; 3 states ask less and 1 asks more. The full comparison is on the hours by state table.
Sources and verification
Every fact on this page traces to one of these
- CT DCP - Heating, Piping and Cooling License Types and Scope of Work
- CT DCP - Heating, Cooling and Sheet Metal Work Licenses (fees, renewal, application paths)
- CT DCP - Heating Journeyperson, Equivalent Experience and Training (hour requirements)
Last verified July 2026. Found an error? Report it and it will be corrected and logged on the corrections page.
Other states with published requirements for this trade: Delaware, Florida, Georgia, Hawaii, Iowa, Kentucky.
Price the whole path with the license cost estimator, or weigh earning against paying for school with the apprenticeship comparison. Back to HVAC technicians overview.
Licensing requirements change between our verification sweeps. This page is informational only, so confirm current requirements with Connecticut Department of Consumer Protection - Occupational and Professional Licensing (Heating, Piping, Cooling and Sheet Metal Work) before making decisions. Not legal advice.