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Best boiler installation pros near Simsbury, CT

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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon642
    Verified boiler installation services reviews

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

Avatar for Atlantic Water Heater Pros
Atlantic Water Heater Pros
4.8(
51
)
Gas Boiler or Radiator Heating System - Install

Serving Simsbury, CT and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Williams & Associates installed a Buderus oil-fired boiler and stainless-steel chimney liner. Bruce's design was a significant upgrade over my 35-year-old boiler system. He clearly explained the process and installation, and he was receptive to my questions. Bruce is knowledgeable, straightforward, and responsive. The price was very fair, considering the quality of the work and other estimates I had gotten. I would not hesitate to recommend Williams & Associates."
Large Mechanical Room
Response time1 day
Recommended by92%of homeowners
Borselle Plumbing & Heating LLC
4.9(
34
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Simsbury, CT and surrounding areas

Approved

In business since 1989

Emergency services offered

Warranties offered

"Joe and his crew did an excellent job installing new boiler and indirect hot water system. I made the decision to convert to gas and replace my 21 year old oil fired boiler. Everything went along smoothly and professionally. Joe kept me informed every step of the process and job was completed on time. I would definitely recommend."
Response time2 days
Response rate100%
1 neighbors recently requested a quote
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 Simsbury, 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
4 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 Simsbury, 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%
39 neighbors recently requested a quote
Avatar for Cool Heat Mechanical, Inc.
Cool Heat Mechanical, Inc.
4.3(
39
)
Gas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For BusinessOil Boiler or Radiator Heating System - Install+1 more

Serving Simsbury, CT and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"The new boiler install went well. They came on time . Cleaned up after themselves. I was having other work done on the house at the same time . everyone worked well together. I would recommend Dave to anyone looking for top notch customer service and quality."
Oil Furnace Install
AC Replacement
Gas Boiler
Oil Boiler Replacement
Gas boiler upgrade

+3

Response time5 hrs
Response rate91%
7 neighbors recently requested a quote
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Install Boiler FAQs, answered by experts

All modern boilers are condensing boilers because they’re the most efficient type. Instead of extra heat leaving through the flue, these boilers trap the heat and use it to heat the house. Whether you choose a combi boiler, system boiler, or regular boiler, you can opt to get a condensing system. If you have an old boiler that’s not a condensing boiler, it’s a good idea to get an upgrade.

Boilers provide even heating, energy efficiency, and a quiet operation compared to forced air systems.

Most propane boilers last 15 to 20 years with regular maintenance and proper care. The lifespan depends on the quality of the unit, proper installation, and the level of maintenance. Investing in annual service can maximize longevity and efficiency. Routine inspections and timely repairs prevent early breakdown, ensuring your boiler heats your home for years to come.

Most home boilers will need an expansion tank. That’s because these boilers are closed-loop systems, where the water is trapped. An expansion tank is needed when the boiler heats the water and it expands, allowing air to condense in the tank to make room for the water. Other types of boilers don’t use an expansion tank, such as traditional steam boilers, but these aren’t as common. And hot water tanks may be able to use a pressure release valve instead. When in doubt, call in a pro to take a look.

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

The Simsbury, CT homeowners’ guide to boiler installation services

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