
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
"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 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 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 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
"Tech found that thermostat had hidden switch under cover. He suggested a better quality programmable thermostat which he installed & is running great."





+9

Serving Harwinton, CT and surrounding areas
In business since 1935
Emergency services offered
Credit card accepted
"I've used Wesson Energy for a few years now as a member of the Connecticut Energy Cooperative. The prices are great and the service is responsive and professional.
In September, I noticed that the gauge on my heating oil tank showed that I was a quarter of a tank low. A few days later I received a notice of delivery from Wesson billing me for approximately 175 gallons of oil (about half a tank). I called to ask why, if I was only a quarter of a tank down, I would have needed so much oil.
Wesson sent out a technician to look at the problem. As it turned out, the gauge was wrong (they acquire a later of silt over time that weighs down the floater). Apparently l had looked at the gauge just after the delivery and the tank wasn't registering as full.
Throughout the course of several phone calls to resolve this problem, representatives for Wesson were courteous and professional.
P.S. Wesson definitely fixed the problem; the old gauge remained on the tank so I was able to compare the readings on the new and old gauges. The old gauge consistently registers a quarter-tank lower.
"



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