Top-rated boiler installation pros.

Best boiler installation pros near Cromwell, CT

Enter your zip and get matched with up to 5 pros

TRUSTED BY CROMWELL, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon1.1k+
    Verified boiler installation services reviews

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

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

Serving Cromwell, 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 Cromwell, 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 Cromwell, 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
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Cromwell Energy, Inc.
Cromwell Energy, Inc.
4.4(
8
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Cromwell, CT and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"I had a furnace installed 20 years ago. Since then it has been serviced by four (4) well-known Oil companies. To my dismay, not one could figure out why my furnace would get DIRTY as often as it did. It even plugged up within a year. Cleaning after cleaning ($$$ spent). I became very frustrated. Based on a friends recommendation, I called Cromwell Energy. I was amazed at the professionalism of the entire team. When Lou and Rich assessed the furnace they referred to the manufacturer and was advised that the burner that was originally installed and since replaced by another company was not the correct one to begin with! They corrected the problem and I have been trouble-free since. Thanks guys. I wish more companies would provide this type of service. You've got my business and I have since referred them to other family members who are just as pleased as I am. Keep up the good work! Your loyal customer."
New boiler install
Response time2 days
Recommended by100%of homeowners
...
Showing 1-10 of 65
Install Boiler FAQs, answered by experts

Warmed or cooled air can escape your home through drafty windows and doors. If you notice any gaps, be sure to caulk and seal them. You can also hire a local pro for an energy audit to get a list of energy-saving recommendations. 

Finally, check your insulation. It can settle in over time and become less effective. The Environmental Protection Agency (EPA) estimates that you can save an average of 15% on heating and cooling costs (or 11% of total energy costs) by sealing leaks and making sure attics, crawl spaces, and basements have a nice layer of insulation.

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

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

It can take anywhere from four hours to three days to replace a boiler with a new one. How long your particular boiler installation takes will depend on whether you need a gas line installed and if you’re switching to a new boiler system. 

Replacing a combination boiler or standard boiler with the same system should only take four to six hours. Meanwhile, switching from a conventional boiler system to a combination boiler system could take a few days.

Boiler installations and replacements cost between $3,600 to $8,400. Expect to pay around $5,900 on average for a new boiler, including installation. Adding new radiators or heaters to the boiler may include separate costs if you are also upgrading those components, so the final price may be higher. To decrease costs, you can look for local energy rebates for using a boiler and wait until installers are offering discounts for a first-time installation.

The Cromwell, CT homeowners’ guide to boiler installation services

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