4.6 
1.4k+ *The Angi rating for Boiler Installation companies in Derby, 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 Derby, 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 October 17, 2025
Serving Derby, CT and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Yes, one day install conversion from tank electric to tankless gas with water softener"
+6
Serving Derby, 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 Derby, CT and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"I always trust Chris as my technician to deliver superb service re: my furnace/boiler, hot water tank, split A/C system, and dehumidifier. It's a pleasure to greet him semi-annually, since he's courteous, pleasant, and professional, and since he answers all my questions re: my heating and cooling systems. I trust this talented tech being inside my home and tuning up all these systems. Kudos to Tyler Heating & A/C for hiring Chris as its employee."
+172
Serving Derby, CT and surrounding areas
Approved
In business since 2008
Free estimates
Emergency services offered
"Mike and His team did a professional job . Mike did a great job of communicating with me through multiple emails until he knew that I was comfortable with the boiler that he installed in my home . This company gave the best prices out of multiple plumbers I was choosing from and their work was completely professional and they had a great attitude when answered one of my many questions with respect . I'm a ver happy customer after choosing their Service."
+4
Serving Derby, CT and surrounding areas
Approved
In business since 1938
Free estimates
Emergency services offered
"Matt and his team did a fabulous job replacing and installing our oil furnace. He also helped with other issues that we were having with our heating and cooling system for years. Very conscientious, courteous and keeps a the place clean,"
+1
Serving Derby, CT and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"Very professional installation. Was done in a timely fashion and the crew was very professional and clean. Huge difference in the comfort of our home now."
Serving Derby, CT and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"Big job one day removed and installed a home central AC system. A few miscommunication issues. I made a punch list of concerns and sales is working on them. Always returned my calls promptly. Waiting for manuals and installation paperwork."
+24
Serving Derby, CT and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Knowledgeable and friendly from initial consultation to installation. Very happy with Air Inc."
+35
Serving Derby, CT and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"Perfect as I expected and more. East Coast installed a central air system and a ductless heating and calling system in my house. They were much affordable than their competitor."
+5
Serving Derby, CT and surrounding areas
Approved
In business since 1976
Free estimates
Emergency services offered
"Thorough explanation, great service, neat installation and competitive pricing. Would hire again."
+8
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