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Best boiler installation pros near Harwinton, CT

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TRUSTED BY HARWINTON, CT HOMEOWNERS

  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon418
    Verified boiler installation services reviews

Top-Rated Boiler installation pros in Harwinton - Updated Nov 2026

Avatar for Advanced Mechanical Services LLC
Advanced Mechanical Services LLC
4.8(
19
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

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."
Response time11 hrs
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Perfect Timing Heating & Cooling
Perfect Timing Heating & Cooling
5.0(
15
)
Oil Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install

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."
Gary with his fleet
Mike and his Truck
All Hands On Deck!
The Fleet
The Fleet

+1

Response time7 hrs
Response rate100%
35 neighbors recently requested a quote
Avatar for All-Weather Mechanical
All-Weather Mechanical
4.2(
35
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Harwinton, CT and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"We had our a/c and gas furnace installed. Chad did a great job he definitely knows his "stuff." I found him to be very trustworthy. He and his team clean up after themselves they left my home as clean as they found it. If you are looking for excellence then call Chad."
LG Art Cool Premier Wall Unit
LG Art Cool Premier Wall Unit
LG Outdoor Single Zone Unit
LG Art Cool Mirror
LG Art Cool Gallery

+32

Response time1 day
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for J Thurston Fuel
J Thurston Fuel
5.0(
4
)
Boiler or Radiator Heating System - Install or ReplaceGas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

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!"
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+9

10 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Wesson Energy Inc
Wesson Energy Inc
4.5(
32
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Harwinton, CT and surrounding areas

In business since 1935

Emergency services offered

Credit card accepted

"The guys that came out to do our home energy audit where very professional.  They gave me an overall explanation of what they would be doing and as they did their work they updated me regularly as to what they where about to do next as they completed each part.   They found my boiler was a bit out of spec on the amount of CO2 it was producing and I suggested i have it looked at.  I took them up on getting one of their maintance teams over to look at it and to my surprise they where able to be here before the Home energy audit guys left so they where able to explain what they found face to face.  It turned out to be nothing major just a bent piece of metal a little to close to the flame cause a lose of efficient burn.
"
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Recommended by90%of homeowners
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Install Boiler FAQs, answered by experts

Many utility companies and government programs offer rebates or incentives for the installation of high-efficiency propane boilers. These can offset upfront costs and improve your return on investment. Check with your local utility or installer for current offers. Incentives vary by state and provider, so exploring regional programs can help maximize your savings.

Costs depend on issue severity, parts needed, and labor rates.

No, there isn’t always water in radiators. In a one-pipe system, water is constantly circulating from the boiler to the radiators and back. In a two-pipe system, water travels through two separate channels: one that goes to your radiators and one that returns back to the boiler so it can heat up again.

Most experts recommend getting three to five HVAC quotes from licensed, insured, reputable local heating and cooling companies. Getting multiple detailed HVAC quotes (but not too many) lets you compare the equipment, services, and prices of several contractors without being overwhelmed by options. It can also let you see if one contractor’s prices are much higher or lower than the others and give you a chance to ask for clarification. That way, you can weed out any contractors who aren’t providing quality services or materials and find the company that best meets your budget, quality requirements, and long-term goals.

The cost-efficiency of baseboard heaters depends on the type and how you use them. Generally, standard electric baseboard heaters can be expensive to run because they use electric resistance heating, which is less energy-efficient than systems like forced-air or heat pumps. However, hydronic and gas versions are typically much cheaper to operate. Hydronic models are more energy-efficient because they heat a liquid that retains warmth longer, preventing the thermostat from turning on and off as often. The overall running cost is also influenced by local electricity rates, your home's insulation, and your usage habits. To increase efficiency, you can use baseboard heaters for zoning, meaning you only heat the specific rooms you are using.

The Harwinton, CT homeowners’ guide to boiler installation services

From average costs to expert advice, get all the answers you need to get your job done.