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Best boiler installation pros near Harwinton, CT

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    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

"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."
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

"I needed quick service on a 45 year old hot water boiler in a 1938 house I recently purchased.  While I could get the pilot light lit, nothing I did could get the boiler to fire (water was circulating).
On Wednesday I contacted Pelletier Mechanical as Gary (the owner) had been out giving me estimates on the various repairs and modifications I wanted to make.  While Gary was out of the office training (again), Laura his admin arranged for Bill to come out on Friday.  She provided an estimated cost (right on) and a 2 hour window.
Bill showed up on time and after a brief discussion get right to work.  Bill spent about 15 mins. systematically determining why the flame would not light.  He discovered that there the gas was not making it to the main control valve.  He reset the safety shut off valve and the problem was solved.  He then checked all the radiators to make sure that hot water was making it through out the house.  After we determined that the upstairs radiators were not getting hot, Bill checked the water pressure and determined that the pressure was insufficient to fill the upstairs radiators in "real  time".  He suggested that the culprit was the 45 year old water valve and pressure release valve which being cast iron tend to corrode and clog in time.  He proposed a replacement solution and priced it out, and offered to pick up the parts and replace the valves that afternoon.  I decided to wait a few weeks so I could consider replacing the entire boiler.
While we were waiting on the boiler to come up to heat, Bill and I walked through the basement looking at the existing plumbing, tracing the water flow path and discussing the possibility of replacing the hot water tank with a tankless unit. (The hot water run is about 60-65 feet from HW tank to kitchen, bathrooms, etc.)  Bill, like Gary, is knowledgeable and informative.
I will have Pelletier Mechanical  back to do more work on the house."
Gary with his fleet
Mike and his Truck
All Hands On Deck!
The Fleet
The Fleet

+1

Response time7 hrs
Response rate100%
37 neighbors recently requested a quote
Avatar for Chernin HVAC & Refrigeration L.L.C.
Chernin HVAC & Refrigeration L.L.C.
5.0(
12
)
Gas Boiler or Radiator Heating System - Install - For Business

Serving Harwinton, CT and surrounding areas

Approved

In business since 2022

Credit card accepted

Offers commercial services

"I recently had a great experience with Chernin HVAC. They were professional and thorough in maintaining our old AC system. The technician provided valuable recommendations for a future upgrade, highlighting how it would save on energy costs and improve cooling efficiency. I highly recommend Chernin for its expertise and outstanding customer service."
Response time10 hrs
Recommended by90%of homeowners
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

"I worked with several contractors to identify the best solution and price for my new boiler/tankless water heater. Chad was patient and thorough in his explanation of my options and costs. He installed a high efficiency system in 2015 that has worked flawlessly. We NEVER run out of hot water. The space in the basement has been cleared with the elimination of the old boiler and stand alone hot water heater and best of all.... my propane gas usage is 1/3 the amount it has been in previous years. Chad did a beautiful job on the installation. His work is meticulous and I've often told my friends/neighbors it is a work of art. He also helped me with the rebates and finance options available. I could not have asked for a better contractor. Chad was responsive, on time and left my house better than he found it. He removed the old equipment and even helped me by installing a new double filtration system for my well which he configured much better than the previous single filter. Based on this install and level of service, I would give Chad the highest possible recommendation."
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

9 neighbors recently requested a quote
Recommended by75%of homeowners
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Install Boiler FAQs, answered by experts

If your boiler is 20 years old, it’s time to get a new one. Although it may seem to be working fine, it’s likely eating up more fuel than it should. Also, compared to a brand-new boiler, one that’s 20 years old is probably not working as well. When you get your new unit, you’ll notice that your home is heating more quickly, and the heat is consistent throughout all the rooms.

If you're often struggling with radiator issues like chilly spots, leaks, or annoying noises, those are common indications that your radiator may need to be replaced. Corrosion, uneven heating, and persistent hissing sounds are common issues as well. When repairs become a regular chore and your home’s energy bills start to rise, a new radiator will bring the comfort and savings you need.

Costs depend on unit size, labor, fuel type, and whether additional piping or venting is needed.

Yes. In many cases, switching from an old furnace to a high-efficiency boiler can help you save money over time. You can also save money by switching from an electric boiler to a gas boiler, which costs much less compared to the energy bills an electric boil can create. Boilers are often (but not always) more efficient than furnaces, too. Then there are discounts, rebates, and incentives that can help you save on the initial costs.

No, boilers and water heaters are not interchangeable because they serve different primary functions. Boilers are used for central heating systems, providing hot water or steam to heat your home. In contrast, a water heater's purpose is to supply hot water for daily household use, such as for faucets and showers. A water heater alone cannot supply the warm water or steam needed for a central heating system.

While they are not interchangeable, it is common to have both a boiler and a water heater. In fact, a conventional boiler often works best when a water heater system is already in place. The two systems can be combined to provide both heating and hot water, either by pairing a boiler with an indirect water heater or by installing a premade combination boiler-water heater unit. For home heating, some homeowners may also opt for a furnace instead of a boiler.

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.