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Best Licensed HVAC Contractors in Old Saybrook, CT

5 HVAC contractors registered in Old Saybrook hold current DCP licenses, verified against official records as of August 20, 2026. All 5 are listed below, ordered by years licensed.

How we chose: We identified 5 companies registered in Old Saybrook. 5 passed license verification. All 5 are listed below. Our methodology

We earn a fee when you call businesses through numbers on this site. This never affects who is listed or how they rank.

  1. Verified
    August 20, 2026
    Licensed since
    1984
    Held by
    BRIAN A ROUSSEAU
    Scope
    Unlimited
  2. Verified
    August 20, 2026
    Licensed since
    1991
    Held by
    DANIEL G FERRIER
    Scope
    Unlimited
  3. Verified
    August 20, 2026
    Licensed since
    1995
    Held by
    RUSSELL E HAHN
    Scope
    Limited
  4. Verified
    August 20, 2026
    Licensed since
    1999
    Held by
    ALLAN B ROTHSCHILD
    Scope
    Limited
  5. Verified
    August 20, 2026
    Licensed since
    2004
    Held by
    CHARLES E APPLEBY SR
    Scope
    Unlimited

Compare the top 5 at a glance

CompanyLicenseScopeLicensed since
Thermodynamics Mechanical Services#HTG.0303064-S1Unlimited1984
Atc Services LLC#HTG.0303515-S1Unlimited1991
Weather Trend Inc.#HTG.0385622-D1Limited1995
A Rothschild & Son Hvac#HTG.0389653-D1Limited1999
Appleby Plumbing & Heating#HTG.0394550-S1Unlimited2004

Old Saybrook HVAC licensure at a glance

Connecticut licenses people, not companies, so this page counts both and says which is which: 19 current DCP heating, piping and cooling contractor licenses are held in Old Saybrook, and 5 trade-name companies are backed by those license holders. A business appears here only when licensed contractors operate under a registered trade name, and each listing names the person whose license backs it. The state also defines a scope on every credential: 11 of Old Saybrook's licenses are unlimited and 8 limited - shown as published, never ranked on, because scope authorises kinds of work rather than ordering quality. Tenure is what these pages rank on: the median Old Saybrook license has been held 26 years, and the longest-standing license behind a trade-name company was issued in 1984. Licenses here expire on one statewide date per trade each year, so an expiration date says nothing about an individual company and none is shown per listing - it gates currency only. DCP publishes no insurance, no bond and no phone for any licensee, so Connecticut listings show none of the three. eLicense cannot link straight to a record, so every listing above shows its number for you to paste into DCP's eLicense lookup. How we verify.

HVAC Contractors in Old Saybrook: common questions

How many licensed HVAC contractors are there in Old Saybrook?

19 current DCP heating, piping and cooling contractor licenses are held in Old Saybrook, backing 5 trade-name companies. 5 Old Saybrook-registered companies passed our license verification, and all 5 are listed on this page. Only licenses in DCP's four live statuses, unexpired at our data date, count.

Who holds a Connecticut HVAC license - the company or a person?

A person. Connecticut licenses people, not companies: a business appears here only when licensed contractors operate under a registered trade name, and each listing names the person whose license backs it. 11 of Old Saybrook's 19 licenses are unlimited scope and 8 limited - shown as published, never ranked on.

How do I check an HVAC contractor's license in Connecticut?

Every listing above shows the license number and names its holder. DCP's eLicense lookup cannot link straight to a record, so open it and type the number in. The median Old Saybrook license has been held 26 years, and the longest-standing license behind a trade-name company was issued in 1984.

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