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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon438
    Verified boiler installation services reviews

Verified Reviews for Boiler Installation pros in Old Saybrook, CT

*The Angi rating for Boiler Installation companies in Old Saybrook, 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 Old Saybrook, 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 October 07, 2026

Find Boiler installation pros in Old Saybrook

Avatar for Cawiamca Heating, Cooling, and Electrical
Cawiamca Heating, Cooling, and Electrical
5.0(
96
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Old Saybrook, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"They were quick to answer our inquiry and quick to schedule an appointment, quick to provide a proposal and after being hired they were quick to start and finish the installation. Very professional, easy to work with and a very high quality installation."
Variable Refrigerant Flow Cold Weather Heat Pump in East Lyme
VRF Cold Weather Heat Pump in Groton
Additional Photos
Additional Photos
Response time8 hrs
29 neighbors recently requested a quote
Recommended by92%of homeowners
Request Quote
Avatar for Atlantic Water Heater Pros
Atlantic Water Heater Pros
4.8(
51
)
Gas Boiler or Radiator Heating System - Install

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Williams & Associates replaced an ancient, very large old boiler in my very large house. Bruce calculated the necessary size and found a suitable boiler. He and his crew thoroughly cleared the radiators and lines before removing the old boiler and installing the new one. They checked all the radiators and added new valves as needed during a lengthy checkout. It took several days to do all the work. Throughout, Bruce explained what they were doing and why as well as recommending changes/additions to the original proposal. They were even cheerful about removing the original "Mary Jane" from the basement. I would definitely recommend them to anyone using steam heat. Great job!"
Large Mechanical Room
Response time1 day
Recommended by92%of homeowners
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Avatar for Cawiamca, LLC
Cawiamca, LLC
5.0(
43
)
Gas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For BusinessOil Boiler or Radiator Heating System - Install+1 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"E-mailed for a quote inquiry for boiler install. Received a call and a visit same day. Ron fit us in for a combi boiler install within a week as we lost hot water. Roy and Austin were true professionals. Very knowledgeable, thorough and neat. A solid company that genuinely cares for its customers. Ron and crew... thank you for everything. You're all top notch guys. We're looking forward to our new mini split ."
Steam Boiler
New Boiler Install
New Home Saybrook
Custom built in in progress
Addition in progress

+2

Response time4 hrs
Recommended by100%of homeowners
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Avatar for Onofreo Home Comfort Systems, LLC
Onofreo Home Comfort Systems, LLC
4.9(
38
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"I chose them to put new central air in my home one year ago and I was impressed with the way they conducted themselves so now they are my go to for Boiler repair also."
Gas Furance
Ductless Heat Pump Installation
New Navien System
Old Oil Furance
Ductless Heat Pump Installation

+27

Response time1 day
Response rate86%
56 neighbors recently requested a quote
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Select Mechanical Services, Inc.
4.5(
58
)
Oil Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+2 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2014

Emergency services offered

Credit card accepted

"Ron responded to our call promptly. We had two heating/cooling systems that required servicing. Did a great job at a reasonable price in a timely manner. He responded to my questions clearly and patiently. Would highly recommend him and Select Mechanical Services Inc."
Response time1 day
92 neighbors recently requested a quote
Recommended by90%of homeowners
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Avatar for Parker Mechanical Heating and Cooling
Parker Mechanical Heating and Cooling
4.8(
17
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Old Saybrook, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Excellent response time to no heat on an extremely cold day. Eventually replaced boiler & heating system; knowledge and craftsmanship best I've hired. Great value for the work and level of service provided. Highly recommend this company."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+30

Response time4 days
Response rate100%
10 neighbors recently requested a quote
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Avatar for East Coast Mechanical Inc
East Coast Mechanical Inc
4.4(
94
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+1 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"The technicians were clean, professional and punctual and did the job as was planned."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+5

Response time1 day
Response rate100%
4 neighbors recently requested a quote
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Avatar for Cariati Mechanical, LLC
Cariati Mechanical, LLC
5.0(
6
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"They did an exceptional job with installing my new warm air system. Would highly recommend!"
Our Projects
Our Projects
Our Projects
Our Projects
Our Projects

+60

Response time3 days
Recommended by100%of homeowners
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Avatar for Precise HVAC Home Services
Precise HVAC Home Services
3.8(
4
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"It got done, unfortunately required a full system replacement."
New boiler trims needed
After very dirty oil boiler cleaning
Very dirty oil boiler
Neglected gas furnace
Heat Pump Install

+22

Response time7 hrs
Response rate100%
12 neighbors recently requested a quote
Request Quote
Avatar for The Guild
The Guild
5.0(
4
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Old Saybrook, CT and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Very quick professional. Worked clean."
Response time1 day
Recommended by100%of homeowners
Request Quote
Showing 1-10 of 39
Install Boiler questions, answered by experts

Safety concerns with propane boilers include proper venting to prevent carbon monoxide buildup, secure gas line connections, and regular inspection of safety controls. Professional boiler installation and annual maintenance are essential to minimize risks. Having a carbon monoxide detector installed in your home is essential for early detection of any leaks or ventilation issues.

Radiators are a popular home heating choice in older homes, but they are becoming less common in new-construction homes. According to a 2022 report by Elements Visual Capitalist, only around 1.3% of new single-family homes have radiators and similar heating systems, such as baseboard heating.

While they may not be as popular as they once were, radiators today come with more energy-efficient features that can make them practical for modern homeowners.

If you have a closed-system boiler that requires an expansion tank, you cannot safely operate it without one, as this risks extensive damage or even explosions. You must find a way to make room for the installation. Options include repositioning the boiler, rerouting the boiler piping to a more open area, or performing minor remodeling to create the necessary space. If you are unsure whether your boiler needs an expansion tank or how to best accommodate one, it's recommended to have a local heating service professional assess the situation. They can confirm the requirement and suggest the most practical solution.

Yes. Boilers need water to run without overheating, also known as dry firing. If you run it without a sufficient volume of water, either because of a burst pipe or a leak, you run the risk of damaging your machine or jeopardizing the safety of your home as a whole. When in doubt, shut off your boiler and repair any plumbing issues before turning it back on. Alternatively, consider installing a low-water cutoff (LWCO) before any issues arise. This gadget will protect your boiler by monitoring water levels and automatically shutting it off if it gets too low. 

A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.

The Old Saybrook, CT homeowners’ guide to boiler installation services

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

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