Quick Reference Table
Item | Details |
|---|---|
License Types | S-1, S-3, S-7, S-9, B-1, D-1, D-3, VT-1 (Contractor); S-2, S-4, S-8, S-10, B-4, D-2, D-4, VT-2 (Journeyperson) |
Regulating Agency | CT Department of Consumer Protection (DCP) – Occupational & Professional Licensing Division |
Experience Required | Two years as licensed journeyperson or equivalent (contractor license) |
Exam Required | Yes, trade and business law exams (administered by PSI, 70% passing score) |
Renewal | Annually, August 31 (for all license types) |
Continuing Education | No CE for contractors; 30 hours over 3 years for inspectors only |
Application Fee | $150 contractor, $90 journeyperson (as of 2026) |
Renewal Fee | $150 contractor, $120 journeyperson (as of 2026) |
Exam Fee | Paid directly to PSI (not specified on official site) |
Bond/Insurance | $15,000 bond (for Home Improvement Contractors, not HVAC-specific) |
Apply | |
Forms |
Who Needs a License in Connecticut?
If you plan to perform, offer, or contract for any heating, cooling, piping, or HVAC-related work in Connecticut for pay, you must meet the HVAC license requirements in Connecticut. The only exception is for small home improvement jobs that do not exceed $200 per job or a total of $1,000 in a twelve-month period. However, even in these cases, the work must not require a trade license under state regulations.
You need an HVAC contractor license (e.g. S-1 Unlimited Heating-Cooling Contractor) to act independently, submit bids, or contract for HVAC installations and service. In contrast, a journeyperson HVAC license allows you to work as an employee under a contractor but does not permit you to contract or advertise independently.
Connecticut defines HVAC work by statute. This includes installing, servicing, or repairing heating and cooling systems, piping (for hot water, steam, or refrigerant), and related mechanical systems. Residential "home improvement" work over $200 per job or $1,000 per year requires separate Home Improvement Contractor registration. For complete scope details, see the full regulations at eregulations.ct.gov.
Journeypersons are always employees; contractors may work solo, run a company, or subcontract. You must hold the proper HVAC contractor license before advertising or taking on any Connecticut HVAC project as a business owner.
HVAC License Types in Connecticut
Connecticut recognizes a wide range of HVAC license types, each granting the holder a distinct scope of work. The main divisions separate broad-scope licenses ("unlimited") from trade- or task-limited licenses ("limited"). You must choose the license classification that fits the exact work you perform, then follow the HVAC license requirements in Connecticut for that class.
S-1 Unlimited Heating-Cooling Contractor: Covers all heating, piping, and cooling system installation, service, and repair (residential and commercial; full scope, state-wide).
S-2 Unlimited Heating-Cooling Journeyperson: Permits work in all heating-cooling systems but only as an employee.
S-3, S-4 Limited Heating: For specific heating work only. S-3 is the contractor level, S-4 the journeyperson level.
S-7, S-8 Alternate Limited Heating: S-7 for contractor, S-8 for journeyperson with a more restricted scope (detailed in regulations).
S-9, S-10 Limited Heating Cooling: Residential/small job focus. S-9 is contractor, S-10 is journeyperson. Intended for limited HVAC systems (see definitions).
B-1, B-4 Limited Gas-Oil Burner: Focus on gas and oil burner installation and service. B-1 is for contractors; B-4 for journeypersons.
D-1, D-2 Limited Air Conditioning, Refrigeration & Warm Air: D-1 is contractor, D-2 is journeyperson. For air conditioning, refrigeration, and ducted warm air systems.
D-3, D-4 Limited Cooling: D-3 is contractor, D-4 is journeyperson. For cooling and certain refrigeration work only.
VT-1, VT-2 Limited Valve-Type: For specialized valve-type heating systems.
OE-2 Operating Stationary Engineer: Not a contractor license; applies to stationary engineering (employee role only).
Each HVAC contractor license requires at least two years as a properly licensed journeyperson or an approved "equivalent experience and training" path. Most importantly, only properly licensed contractors can act as the "license qualifier" for a business. Select your license class based on your work’s exact scope, and see the statutory details at Connecticut HVAC trade regulations.
How to Get Licensed in Connecticut
To meet HVAC license requirements in Connecticut and obtain your license, follow these detailed steps for contractors:
Determine License Classification: Review your scope of work and identify the matching HVAC license classification on the DCP trade portal.
Confirm Eligibility: Make sure you have either held the required journeyperson license for two years or can document an equivalent amount of approved training and on-the-job experience (for example, 12,000 hours practical and 576 classroom hours for S-1).
Complete Required Training: Gather proof of classroom education (transcripts) and on-the-job hours (notarized employer letters) as demanded by your path. Equivalent experience pathways are subject to detailed DCP review.
Collect Documentation: Include proof of license, training transcripts, employer reference letters, and other supporting materials per the application checklist on the OCC-CNTR-APP application form.
Submit Application: File your complete application and pay the appropriate non-refundable fee ($150 contractor, $90 journeyperson as of 2026) to the DCP either online at the eLicense portal or by mail using the PDF form above.
Register for Exams: Wait for DCP to review and authorize you for the exam(s), then schedule and pay for your test with PSI (the exam provider). Both trade and business law exams are typically required. Passing score: 70%.
Receive Your License: After you pass, DCP will process your file and issue the license. The time to process varies; verify any current timelines at DCP licensing portal.
Online vs. Paper Applications
Connecticut now offers an eLicense portal for faster submission and tracking. However, you may still use the .pdf application form and mail or deliver your application to DCP. Processing times are not specified by DCP; plan for several weeks or contact the agency directly to confirm.
Required Forms
Use the official OCC-CNTR-APP for contractor license applications. Supporting documents and specific requirements vary by license class.
Application Requirements
Meeting the HVAC license requirements in Connecticut involves documenting your experience, training, and employment status. Below are common requirements, with sources and any noted gaps.
Experience and Age
To apply for any HVAC contractor license, you must show at least two years as a licensed journeyperson in Connecticut or provide equivalent experience and training. This typically means at least 12,000 hours on-the-job and 576 hours classroom training for unlimited scope licenses (e.g., S-1). You must provide notarized letters from employers, plus official transcripts as applicable. Age and citizenship/residency requirements are not specified by the DCP licensure sources (verify at DCP HVAC licensing page).
Bond and Insurance
If you plan to perform home improvement work, a $15,000 surety bond is required for Home Improvement Contractor registration. This bond does not currently apply to the HVAC trade license itself, but separate civil requirements, such as liability insurance of $20,000 minimum, may apply under the Home Improvement Act for residential work. Always verify what your business must carry before bidding jobs at Home Improvement Act §20-420.
Other Documentation and Checks
Financial statements are not requested as part of your HVAC license requirements in Connecticut. There is no background check or fingerprinting process specified. EPA Section 608 refrigerant certification or other federal credentials are not mentioned as part of the DCP application.
Exams
All HVAC license applicants in Connecticut must pass a trade exam and may also have to pass a business law/management exam. Both exams are administered by PSI under contract with the state DCP. A passing score is set at 70% (as of 2026; confirm any updates at the DCP or PSI registration portal).
The exams are proctored and administered in person at authorized PSI locations. The exam is not specified as open or closed book by official DCP sources. Details on question count, content outline, and time limit are not published; you must check directly with PSI or Connecticut DCP when scheduling your exam. Exam fees are paid to PSI at registration, but exact dollar amounts are not specified in Connecticut’s official materials (verify at time of testing).
If you fail, retake policies are not detailed in current state materials. Always check with the DCP exam coordinator for retesting rules.
Fees
Understanding all HVAC license requirements in Connecticut includes being aware of every official fee. The following amounts are confirmed from Connecticut DCP as of 2026:
Application fee (Contractor): $150 (non-refundable) (as of 2026, verify on DCP)
Application fee (Journeyperson): $90 (non-refundable) (as of 2026, official schedule)
Exam fee: Paid to PSI at registration. Amount is not published in current DCP or PSI materials. Verify latest at exam signup.
Renewal fee (Contractor): $150 annually, due August 31 (as of 2026, see DCP)
Renewal fee (Journeyperson): $120 annually, due August 31 (as of 2026, official source)
Bond for Home Improvement Contractors: $15,000 (covers home improvement registration only; not required for HVAC trade license as of 2026)
Late fees, exam retake fees, or other administrative charges are not listed in Connecticut’s current official fee schedule. Always check for updates on the DCP licensing portal.
Renewal and Continuing Education
Every Connecticut HVAC contractor and journeyperson license must be renewed annually by August 31. Renewal fees for 2026 are $150 (contractor) and $120 (journeyperson). You must submit your renewal through the DCP portal or with the renewal forms provided each cycle.
Continuing Education
Standard HVAC contractors and journeypersons in Connecticut are not required to complete continuing education hours as a condition of renewal. This requirement applies only to state and local heating/cooling inspectors, who must complete 30 hours every three years. For any possible future changes, verify requirements each renewal cycle at the RCSA Continuing Education section.
Lapsed License and Reinstatement
If you fail to renew your HVAC license by August 31, your license will lapse. The DCP provides a reinstatement process, but late penalties, reinstatement fees, and the process to restore a lapsed license are not specified in current regulations. Always renew before the annual deadline to avoid interruptions in your ability to bid or perform HVAC work.
Reciprocity for HVAC License Requirements in Connecticut
Connecticut does not offer reciprocity for HVAC contractor or journeyperson licenses. There are no endorsement pathways or agreements with other states. Every new applicant, regardless of out-of-state licensure, must meet all HVAC license requirements in Connecticut, including exams, experience, and DCP application. For the latest policies, consult the official statement at the DCP HVAC licensing overview.
