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TRUSTED BY OLD SAYBROOK, CT HOMEOWNERS

  • 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(
95
)
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
28 neighbors recently requested a quote
Recommended by93%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
Request Quote
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
Request Quote
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

"Very professional and diligent with the installation of our new heating and hot water system. We could not be happier with how we were treated by all we came in contact with at Onofreo."
Gas Furance
Ductless Heat Pump Installation
New Navien System
Old Oil Furance
Ductless Heat Pump Installation

+27

Response time1 day
Response rate86%
55 neighbors recently requested a quote
Request Quote
Select Mechanical Services, Inc.
4.5(
58
)
Oil Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallElectric 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

"Gary (owner), Brian and Bill did an excellent job replacing our propane gas furnace. Good pricing, speedy service, new furnace installed in 24hours from first visit, quote in February during supply chain issues, no easy feat, and replaced with a quality name brand. Don't hesitate to hire them if your system stops working."
Response time1 day
90 neighbors recently requested a quote
Recommended by90%of homeowners
Request Quote
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

"Parker Home Services did a phenomenal job working with existing piping and also installing new piping and mini splits. They were prompt, clean, respectful, and very easy to work with. I will be using them again, and would highly recommend them to friends and family!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+30

Response time4 days
Response rate100%
10 neighbors recently requested a quote
Request Quote
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%
6 neighbors recently requested a quote
Request Quote
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
Request Quote
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

Coolant and antifreeze are technically not the same thing. The difference between the two is the ratio of water to other chemicals. True antifreeze is mainly made up of either ethylene glycol or propylene glycol, while coolant comprises one part antifreeze and one part water. However, the terms coolant and antifreeze are often used interchangeably, even by pros.

A furnace takes in cool air, heats it through the burner and heat exchanger, and sends the air on its way to warm your home. A boiler is a pressurized vessel that produces hot water or steam to heat the home and provide hot water. A boiler may or may not work together with a furnace.

Costs range from $3,000 to $7,500, depending on system size and efficiency.

Using heating oil to heat your home has its advantages, but it also has its disadvantages. 

Consider these drawbacks before installing a heating oil system:

  • Heating oil prices fluctuate frequently

  • Risk of oil spills or leaks

  • Produces more air pollution and soot compared to a gas furnace

  • Regular maintenance required for equipment

  • Need to reorder heating oil consistently to avoid running out

Depending on the size of your home and system, as well as any upgrades or add-ons you choose, it may take between three and five days to completely replace an existing HVAC system from start to finish. Your contractor should be able to give you an estimate before they begin the actual replacement.

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.

See all articles