Connecticut HVAC License Requirements (2026)

Connecticut regulates heating, piping and cooling work through individual occupational licenses issued by the Department of Consumer Protection (DCP). The S-2 Unlimited Heating, Piping and Cooling Journeyperson may do the full statutory heating, piping and cooling scope only while employed by a licensed contractor. The S-1 Unlimited Heating, Piping and Cooling Contractor may do the full scope as a contractor. DCP describes the S-2 path as completion of a registered apprenticeship or equivalent experience and training; its current table identifies 8,000 on-the-job-training hours and 576 classroom hours. The standard S-1 path is more than two years holding the respective journeyperson license; DCP also has documented equivalent-experience and equivalent-out-of-state-license pathways. This state occupational license does not eliminate local permit, inspection, or business requirements.

Regulatory Body

Connecticut Department of Consumer Protection — Occupational and Professional Licensing Division (DCP) is the statutory authority responsible for issuing and enforcing this license under Conn. Gen. Stat. §§ 20-330 to 20-341. Licenses individual heating, piping and cooling contractors and journeypersons, processes applications and renewals, and works with the Heating, Piping, Cooling and Sheet Metal Work Examining Board.

Official portal: https://portal.ct.gov/dcp/license-services-division/all-license-applications/heating-cooling-and-sheet-metal-work-licenses
Address: 450 Columbus Boulevard, Hartford, CT 06103
Phone: (860) 713-6135

Eligibility Requirements

This guide does not establish a minimum applicant age; confirm any age requirement with the issuing authority. Applicants must provide a Social Security Number. DCP’s current heating, cooling and sheet-metal licensing page does not list Connecticut residency as a condition. Out-of-state applicants use DCP’s equivalency review rather than reciprocity.

Good moral character

Use DCP’s current individual application and accurately provide all requested disclosures. DCP determines eligibility before PSI scheduling.

Background investigation

The current DCP heating, cooling and sheet-metal page does not list a separate universal background-check fee or step. Follow the current application instructions.

Experience and Education

The experience bar is 4 years of S-2: a registered apprenticeship or equivalent experience and training; DCP’s current table lists 8,000 on-the-job-training hours and 576 classroom hours. S-1: more than two years holding the respective journeyperson license, or an equivalent-experience/equivalent-out-of-state review; DCP’s S-1 equivalency table lists 12,000 on-the-job-training hours and 576 classroom hours., and it must be backed by verifiable records — typically payroll, tax, project, or supervisor documentation covering the claimed period.

Accepted proof of experience or eligibility

For a Connecticut apprenticeship: the original Letter of Apprenticeship Completion issued by the Connecticut Department of Labor
For equivalent experience: notarized employer letters with dates and detailed job training, plus proof of required related instruction
For an equivalent out-of-state license: one license, official verification, issuing-jurisdiction requirements, and scope of work, as requested by DCP

Education substitution

DCP requires evidence of both relevant instruction and on-the-job training for equivalency. Do not treat an HVAC school credential alone as an automatic substitute for the documented S-2 work requirement.

Exam Requirements

The examination requirement has not been established in this record. Confirm it with the authority before applying. Provider or process notes: PSI Services LLC, after DCP approves examination eligibility

Examination fee: $59 for each PSI examination portion, including repeats. A journeyperson takes a trade portion; a contractor must pass both a trade portion and the Business and Law portion.

Retake policy: PSI permits unlimited attempts within the one-year DCP eligibility period. Contractor examination portion scores are valid for two years; consult the current PSI bulletin before scheduling.

Insurance and Bonds

No statewide contractor license surety bond is required for this credential in the cited sources. Project-specific, permit, or public-works bonds may still apply, so confirm bonding before bidding a given job.

General liability

DCP’s current heating, cooling and sheet-metal trade-license page does not list a state general-liability or bond prerequisite for S-1 or S-2 issuance. Project contracts, owners, lenders, and local permitting authorities may impose insurance requirements.

Workers' compensation

Workers’ compensation obligations are separate from the occupational license. Confirm coverage requirements before employing workers.

Additional financial requirements

DCP’s current trade-license page does not list a financial-statement filing for S-1 or S-2 issuance.

Fee Schedule

Fee	Amount
Application	$90
Examination	$59
Initial license	$120
Renewal (every year)	$120

To turn these board fees into a realistic year-one budget — bond premium, liability insurance, and exam prep included — open the cost calculator preloaded for Connecticut hvac.

Renewal and Continuing Education

The Connecticut S-2 Unlimited Heating, Piping and Cooling Journeyperson and S-1 Unlimited Contractor must be renewed every year. The fee to renew is presently $120. S-2 renewal is $120 and S-1 renewal is $150. Both license classes expire annually on August 31.

Continuing education: The current DCP license fee table lists no continuing-education requirement for Heating, Piping and Cooling Unlimited Contractor and Journeyperson credentials. Confirm the active DCP renewal notice before filing, because renewal conditions can change.

Downloadable Asset

2026 Connecticut HVAC License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity

Connecticut grants no NASCLA reciprocity for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

DCP states that Connecticut has no reciprocal agreements with any other jurisdiction. It may review a single out-of-state credential for equivalency when its classroom curriculum, classroom hours, on-the-job training, and scope are comparable.

Weighing more than one jurisdiction? The national hub compares published HVAC license requirements by state — exam, bond, fee, and experience thresholds side by side.

HVAC Licensing in Neighboring States

Contractors working near a state line, or weighing where to qualify first, should compare Connecticut's requirements against the bordering jurisdictions before committing to an application:

Massachusetts HVAC License Requirements — Massachusetts HVAC — Refrigeration, Sheet Metal, Gas, Plumbing, and Oil-Burner Credentials
New York HVAC License Requirements — New York HVAC — Local Requirements / NYC Oil Burner Equipment Installer
Rhode Island HVAC License Requirements — Rhode Island Mechanical Trades: Pipefitter, Refrigeration, and Sheet Metal

Step-by-Step Application Roadmap

Confirm that S-2/S-1 fits the work. DCP issues both unlimited and limited heating, piping and cooling credentials. S-2/S-1 is the full statutory scope; select a limited class only if its published scope fits the services.
Complete the qualifying S-2 training. Complete a registered apprenticeship or compile DCP’s required equivalency evidence. The current S-2 table lists 8,000 OJT hours and 576 classroom hours.
Apply to DCP before testing. DCP accepts individual applications, not company applications, and does not pre-review incomplete applications. Submit the required license-path evidence before PSI scheduling.
Pass the S-2 trade examination. Once DCP approves eligibility, schedule through PSI. The current PSI occupational-trades bulletin lists $59 per examination portion.
Meet S-1 experience requirements. The standard S-1 path is more than two years holding the respective journeyperson license. DCP documents separate equivalent-experience and equivalent-out-of-state pathways.
Pass both S-1 examination portions. Contractor applicants need the trade and Business and Law portions. PSI’s Business and Law bulletin lists 50 questions, two hours, and a 70% passing score.
Renew and obtain local permits. S-1 and S-2 licenses expire annually on August 31. Use the local authority’s mechanical, fuel-gas, building, or other permit process for each project.

Application Checklist

Before submitting to DCP, the applicant should have each of the following ready:

Correct S-2 or S-1 individual DCP application selected
DOL Letter of Apprenticeship Completion or DCP-equivalency documentation
For S-2 equivalency, evidence of 8,000 OJT hours and 576 classroom hours
For standard S-1 eligibility, proof of more than two years holding the respective journeyperson license
DCP application fee: $90 S-2 or $150 S-1
PSI trade examination, plus Business and Law for S-1
Annual August 31 renewal and project-specific local permits

Common Filing Mistakes

These are the recurring mistakes that most often delay or reject a Connecticut HVAC application, based on the official instructions cited here.

Treating S-2 as a contractor license

S-2 holders may do the unlimited scope only while employed by a licensed contractor. The contractor credential is S-1.

Calling equivalency reciprocity

DCP says Connecticut has no reciprocal agreements. An out-of-state credential is reviewed individually for comparable requirements and scope.

Leaving out classroom proof

The DCP S-2 equivalency path requires both documented 8,000 OJT hours and 576 classroom hours; work experience from another state does not by itself replace the instruction requirement.

Budgeting one contractor exam

An S-1 applicant needs a trade portion and the Business and Law portion, with a separate PSI fee for each.

Missing the August renewal

Heating, cooling and sheet-metal trade licenses expire annually on August 31. Track the S-1/S-2 fee difference and current DCP notice.

Study and Reference Materials

These materials are drawn from the regulator's own citations and the references applicants commonly use to prepare. CLR receives no compensation for listing them.

Connecticut Occupational Trades Candidate Information Bulletin — PSI Services LLC. Use the current bulletin for the exact S-2/S-1 trade reference list, examination conditions, and Business and Law requirements.
Connecticut heating, piping and cooling licenses and scope of work — Connecticut DCP. Use the official scope page to distinguish unlimited S-1/S-2 work from limited HVAC, gas, burner, refrigeration, and sheet-metal credentials.
Connecticut General Statutes, Chapter 393 — Connecticut General Assembly. Primary statutory source for the occupational licensing framework and scope definitions.

Other Connecticut Trade Licenses

Looking at a different trade? CLR also publishes these Connecticut licensing guides:

Frequently Asked Questions

What do Connecticut S-2 and S-1 licenses cover?

S-2 is the unlimited heating, piping and cooling journeyperson credential and may do the full scope only while employed by a licensed contractor. S-1 is the unlimited contractor credential and may do the full statutory scope as a contractor.

How do I qualify for Connecticut S-2?

DCP requires completion of a registered apprenticeship or equivalent experience and training. Its S-2 table lists 8,000 on-the-job-training hours and 576 classroom hours.

Does Connecticut reciprocate HVAC licenses?

No. DCP says Connecticut has no reciprocal agreements. It may evaluate one out-of-state license for equivalency if its requirements and scope are comparable.

Do I need EPA Section 608 certification?

Federal EPA Section 608 certification is required for technicians who perform covered refrigerant work. It is a separate federal credential; do not assume the Connecticut S-1/S-2 license replaces it.

When do S-1 and S-2 licenses renew?

All heating, cooling and sheet-metal work licenses expire annually on August 31. Current annual renewal fees are $120 for journeypersons and $150 for contractors.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-09-04 · Next scheduled review 2026-12-03

Report a correction to this guide

Corrections and presentation updates

2026-09-30: Corrected examination detection when format details are unpublished and updated the summary layout and requirements score. Source-check dates are unchanged.
2026-09-08: Shared template updated to distinguish unspecified eligibility requirements, retain cost qualifications, and use consistent headings. Source-check dates are unchanged by presentation updates.
2026-09-21: Local-only guides now use a compliance-focused structure and terminology instead of implying a statewide license application. Source-check dates are unchanged by this presentation update.