4.6 
864 *The Angi rating for Boiler Installation companies in Durham, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation companies in Durham, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Boiler Installation needs.
Last update on August 27, 2025
Serving Durham, CT and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Outstanding service and professional installation!!"
+6
Serving Durham, CT and surrounding areas
Approved
In business since 1998
Free estimates
Emergency services offered
"Williams & Associates installed a Buderus oil-fired boiler and stainless-steel chimney liner. Bruce's design was a significant upgrade over my 35-year-old boiler system. He clearly explained the process and installation, and he was receptive to my questions. Bruce is knowledgeable, straightforward, and responsive. The price was very fair, considering the quality of the work and other estimates I had gotten. I would not hesitate to recommend Williams & Associates."
Serving Durham, CT and surrounding areas
Approved
In business since 1945
Free estimates
Emergency services offered
"John was outstanding! He meticulously diagnosed the problem and installed the equipment after tracking it down at 2 local supply houses. He kept us informed every step of the way and worked diligently until the work was completed. This is the second time we've asked Mull Bros. to perform a service at our house. We received excellent service both times. Mull Bros. is a highly professional company that has exceeded our expectations.
"
Serving Durham, CT and surrounding areas
Approved
In business since 1989
Emergency services offered
Warranties offered
"Joe and his crew did an excellent job installing new boiler and indirect hot water system. I made the decision to convert to gas and replace my 21 year old oil fired boiler. Everything went along smoothly and professionally. Joe kept me informed every step of the process and job was completed on time. I would definitely recommend."
Serving Durham, CT and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"Prompt, efficient service --- Technically knows gas furnace products --- More importantly knows the economics of keeping up with repairs on a 30 year old unit vs going with a new unit --- Not a sales pitch -- just facts ---- Went new and the cost including nicely done installing was much lower than I originally thought it would be . Review by Clark D. in Madison CT"
+4
Serving Durham, CT and surrounding areas
Approved
In business since 2018
Free estimates
Small jobs welcome
"I chose them to put new central air in my home one year ago and I was impressed with the way they conducted themselves so now they are my go to for Boiler repair also."
+27
Serving Durham, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Excellent response time to no heat on an extremely cold day. Eventually replaced boiler & heating system; knowledge and craftsmanship best I've hired. Great value for the work and level of service provided. Highly recommend this company."
+30
Serving Durham, CT and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"Did not seal the inside of the new vent. It took weeks to get the permit number from them to schedule the inspection."
+5
Serving Durham, CT and surrounding areas
Approved
In business since 2022
Credit card accepted
Offers commercial services
"They have replace my last to HVAC companies!"
Serving Durham, CT and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
"They did an exceptional job with installing my new warm air system. Would highly recommend!"
+60
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