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author RocketCert Staff
date 05.08.2026

Obtaining a Connecticut unlimited heating and cooling license is a great way to move your HVAC career forward. Whether you're a journeyperson or looking to get started as an independent contractor, you can choose from the S-1 and S-2 licensing paths to get properly authorized to work in Connecticut.


What Is a Connecticut Unlimited Heating, Piping, and Cooling License?

Connecticut provides professionals with unlimited heating, piping, and cooling licenses to allow them to carry out HVAC-related work across residential, commercial, and industrial settings. The credentials cover a wide range of heating, piping, and cooling work.


Understanding the Difference Between S-1 and S-2 Licenses

There are two types of licenses, S-1 and S-2. The S-2 license is a credential at the journeyperson level. It lets a journeyperson carry out heating, piping, and cooling work when employed by a fully licensed contractor. It's an important step following an apprenticeship.

The S-1 license is for contractors. It lets qualified professionals operate at a higher level of responsibility, including supervising work. License holders can contract for unlimited heating, piping, and cooling projects throughout Connecticut.


License Experience and Training Requirements

Qualifying for the S-2 license requires applicants to have completed a registered apprenticeship program or demonstrated equivalent experience and training. Candidates must have practical field knowledge before they can become licensed to work as a journeyperson in Connecticut.

The S-1 contractor license requires two years of experience as a licensed journeyperson. The state can evaluate a variety of factors, such as classroom course hours, on-the-job training, and related documentation.

Equivalent experience and training can sometimes be used instead of the standard apprenticeship path. For an S-1 license, applicants require 12,000 on-the-job training hours and 576 classroom hours.


Preparing for the License Exam

Before applying, make sure you have the proper work experience and training for the specific license path. Get your documents in order, as the process can require employment and education records.

The licensing exams cover a variety of technical rules and procedures required for heating, piping, and cooling. Applicants should study thoroughly before moving forward to ensure they can successfully obtain their license.

The S-1 and S-2 licenses have separate exams. Connecticut handles these exams through PSI Examination Services. Applicants must pass the exam and then submit their score report to the Connecticut Department of Consumer Protection.


Maintaining Your Connecticut Unlimited Heating, Piping, and Cooling License

Once you've obtained your license, you'll need to follow a few requirements to keep it active. Licenses expire annually, so make sure to remember the August 31 deadline to avoid any interruption in your ability to work. State renewal fees are $150 for S-1 licenses and $120 for S-2.

If your license does expire, you can submit a reinstatement form within three years, which requires a higher fee than standard renewal. If the license has expired for more than three years, you must reapply and retest.


Taking the Right Approach to Licensing

If you're ready to pursue your Connecticut contractor's license, RocketCert has the perfect prep course available. Get started with your online course to ensure you know everything required for your S-1 and S-2 exams.