4.2 
418 *The Angi rating for Boiler Installation companies in Harwinton, 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 Harwinton, 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 March 12, 2026
Serving Harwinton, CT and surrounding areas
Approved (Corporate)
In business since 1946
Free estimates
Emergency services offered
"Outstanding service and professional installation!!"
+6
Serving Harwinton, CT and surrounding areas
Approved
In business since 2001
Free estimates
Emergency services offered
"Advanced Mechanical Services (AMS) went out of their way to get our new oil tank installed and the old one removed in the winter. We were experiencing issues with our old tank where our oil company could not fill the old tank. AMS worked closely with us to install the new tank quickly. They kept us in the loop and were on time on installation day. The installers were professional, kept us informed and did an excellent job. In addition, they cleaned up after themselves. We also use them for our annual furnace cleaning. They always do a great job and have come out on emergency calls a few times over the past 25 (or more) years. I highly recommend them."
Serving Harwinton, CT and surrounding areas
Approved
Super Service Award Winner
In business since 2008
Free estimates
Emergency services offered
"The boiler installation job was done great. I even accepted an annual service plan to keep up with proper maintenance. They are wonderful to work with."
+22
Serving Harwinton, CT and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"The team was super helpful and helped provide solutions to keep my family cool during the summer months. They were a pleasure to work with."
+1
Serving Harwinton, CT and surrounding areas
Approved
In business since 1994
Free estimates
Emergency services offered
"Installed arrived on time and worked efficiently until job was successfully completed. They cleaned area when they finished."
+5
Serving Harwinton, CT and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Josh and his team was real quick with the installation and I believe the price is amazing for a brand new combination unit, best price around my area would highly recommend if your looking to install any heating unit"
Serving Harwinton, CT and surrounding areas
Approved
In business since 2022
Credit card accepted
Offers commercial services
"They have replace my last to HVAC companies!"
Serving Harwinton, CT and surrounding areas
Approved
In business since 1999
Free estimates
Credit card accepted
"Very positive experience. They responded immediately when I sent the request. The gentleman who called asked me questions about my current setup and had a technician out promptly. The quote was reasonable and the job was completed in one day. Staff were friendly. Happy customer!"
+9
Serving Harwinton, CT and surrounding areas
In business since 1992
Free estimates
Emergency services offered
"HARP sent a rep to the house, he did the evaluation for sizing, which was in line with the sizing tools I used. The solution he offered was just about what I had picked out, and I went with his recommendation. The install went fine. They did have to be reminded to retape some ducts, but we're happy to take care of it."
+9
Serving Harwinton, CT and surrounding areas
In business since 1935
Emergency services offered
Credit card accepted
"Technician arrived on time. He was extremely pleasant, professional and informative about the servicing. Would recommend him/Wesson Energy to anybody."
From average costs to expert advice, get all the answers you need to get your job done.
The average boiler installation cost depends on size, system type, and other factors. Keep reading to learn the cost of a new boiler.
Discover the average electric boiler installation cost, key price factors, and ways to save. Get transparent, expert-backed estimates for your project.
Get the facts on propane boiler installation costs. Learn what impacts your price, compare options, and budget confidently for your home upgrade.
Looking for a qualified boiler installation pro? Learn how to find and hire the right professional, from credentials to questions to ask.
Installing a boiler requires care and precaution. Use this checklist to install a boiler safely.
Installing a boiler DIY isn’t recommended without the proper skills and experience. Learn how to safely install a boiler in this guide.
