" Duncklee Cooling & Heating named 2020 Small Business
of the year by the Eastern CT Chamber of Commerce "
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Contact Duncklee Cooling & Heating

Comfort. Quality. Reliability.

Jonathan Duncklee, President: 

(860) 536-2552 Mystic, CT
(860) 535-2552 Stonington, CT
(860) 447-8484 New London, CT
(860) 388-5001 Old Saybrook, CT
(860) 886-5000 Norwich, CT
(401) 596-6655 Westerly, RI

Phone Extensions
Service Department:  Extension 1
Sales Department:  Extension 2
Business Office:  Extension 3
Company Directory:  Extension 4
Hours of Operation and Directions:  Extension 5
After Hours Emergency Service:  Extension 9

(860) 535-5420

Mailing Address:
Duncklee, Inc.
296 Taugwonk Road
Stonington, CT 06378

Monday – Friday 8:00 am – 4:30 pm

Please note if your system is under warranty, after hours emergency service is available but NOT covered under warranty.

Closed on the following holidays (these days are subject to time and a half rates with a 2 hour minimum for established customer only):

Memorial Day, 4th of July, Labor Day, Thanksgiving Day (and the day after), Christmas Day, New Years Day, and the week between Christmas and New Years Day.

After hours emergency service is available for established customers only. Holidays, nights, and weekends are billed at time and a half rates with a 2 hour minimum, payable at time of service.