
Serving Harwinton, 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

*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
"Yes, one day install conversion from tank electric to tankless gas with water softener"





+6

Serving Harwinton, CT and surrounding areas
Approved
In business since 2001
Free estimates
Emergency services offered
"Outstanding service. I called because my boiler was leaking and the after hours technician responded within 30 minutes of our call. Our coil plate and gasket were rotted and bolts had snapped and we decided that we would replace the boiler because ours was 16 years old. We spoke with the owner and sales manager the following morning and were told that they would be happy to replace the boiler if that is what we wanted to do but they felt our boiler could be repaired at a fraction of the cost and no where near the end of it's usable life. So we decided to go for the repair and they were right, it worked like a charm! So instead of a $9,000 boiler and indirect replacement, we spent $472 and my boiler was up and running the next day. We have used Advanced Mechanical Services for our conversion from oil to natural gas and for our air conditioning installation. They have always been very professional, courteous, prompt and their pricing has always been competitive. I would 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
"From start to finish with my project Gary and his team were helpful, responsive, knowledgeable, and professional. Gary considered all of my heating/ac/humidity concerns, took full measurements of my condo, system and energy calculations, and recommended three good options of Bryant electric split heat pump systems. I ended up choosing the most efficient top of the line model as I was replacing a 25+ year old unit. I felt that the price was fair and even if I could have found a slightly lower price, I was very comfortable hiring Pelletier based on Gary’s initial follow-up, professionalism and thoroughness when quoting my job. They also went the extra mile when doing the installation under terrible weather conditions. I’m very pleased with the end result. I have no hesitation in recommending Pelletier."





+1

Serving Harwinton, CT and surrounding areas
Approved
In business since 1995
Free estimates
Emergency services offered
"Juan was great to work with. He efficiently cleaned and serviced our Gas Boiler. He provided some education about the capability and also noted we had a great boiler that was maintaining strong water pressure and temperature. Great service. Price was appropriate for non-emergency level work! I would easily use them again."





+22

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 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
Approved
In business since 2025
Free estimates
Emergency services offered
"Asante did an amazing job installing my A/C in just one day! He was extremely professional, punctual, and efficient from start to finish. He explained everything clearly, worked neatly, and made sure everything was running perfectly before leaving. You can tell he takes pride in his work. I highly recommend Asante to anyone looking for quality service and a smooth, stress-free installation. Great experience overall!"


Serving Harwinton, CT and surrounding areas
In business since 1992
Free estimates
Emergency services offered
"Technician came in an checked out the system and cleaned the boiler. The workmanship exceeded my expectations."





+9
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