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Best boiler installation pros near Smithtown, NY

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    Average homeowner rating
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    Verified boiler installation services reviews

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

Avatar for Elite Piping Solutions
Elite Piping Solutions
4.8(
49
)
Gas Boiler or Radiator Heating System - InstallElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Smithtown, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"Billy from Elite Piping Solutions was a pleasure to work with. He is pleasant to speak to, thoroughly professional, explains things completely, and addressed additional items that would have become problems down the road. He brought on other professionals as needed without putting the burden for that on us. We expected the new heating appliances to serve us efficiently for many years to come!"
Response time6 hrs
Response rate90%
11 neighbors recently requested a quote
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Smithtown, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Kevin was great! The rest of the company not so much. Kevin diagnosed the problem immediately as the thermostat, had a replacement in the truck, and completed the installation of the new unit quickly. He showed me how to program the updated version, and everything seemed to be fine - until the next morning. Turned out the replacement was defective. When I called, I was told that they might not be able to get back to me that day, but Kevin interrupted his schedule to come back and put in a new (and working) unit at no charge."
Additional Photos
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+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
KS Mechanical Services Corp
4.8(
20
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Smithtown, NY and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

At KS Mechanical Services we take great pride in our experience, expertise, quality and customer service we provide to meet the consumer?s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. KS Mechanical's expertly trained staff will work with you to design new systems for your home or office to keep within your budget. Our reputation is based on service, safety and quality, regardless of how large or small the job. **10% SENIOR CITIZEN DISCOUNT **FREE ESTIMATES FOR NEW INSTALLATIONS AND REPLACEMENTS **FINANCING AVAILABLE

Recommended by57%of homeowners
Avatar for Just Chillin HVACR, LLC
Just Chillin HVACR, LLC
4.9(
16
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business

Serving Smithtown, NY and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Frank Green provided me an estimate for the installation of a mini-split single unit at my parentâ s home in Farmingdale. His two employees did a professional job. My parents are seniors who live with a full-time aide. They were respectful and accommodating. A day or two after the unit was installed, I reached out to Frank with questions on how to operate the unit and possibly moving it several feet. That same day, he had his employee return to my parentâ s home to discuss the matter further and to drop off another manual considered to be more user friendly which solved our issue. I would definitely recommend Just Chillinâ to other consumers."
West Islip
West Islip
West Islip
Farmingdale
Farmingdale

+7

Response time10 hrs
Response rate85%
Recommended by100%of homeowners
Avatar for RDS Plumbing and Heating
RDS Plumbing and Heating
4.7(
146
)
Oil Boiler or Radiator Heating System - Install

Serving Smithtown, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Small jobs welcome

Offers commercial services

"I posted on a local Facebook page looking for a plumber at 9am. By 11:30a Richard was here. He responded to my post, I sent pictures and questions, he shsred his 94 5 star reviews from here, gave me a price and shared his 1 year warranty. ,while here also completed more work needed in boiler room for a very fair price. Extremely knowledgeable in his trade. Pipes were unsweat, cleaned, rheemed and pro-pressed. Industry standard procedure."
Response time7 hrs
Response rate86%
Recommended by49%of homeowners
Avatar for KS Mechanical Services Corp
KS Mechanical Services Corp
4.8(
18
)
Electric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Smithtown, NY and surrounding areas

Approved

In business since 2010

Free estimates

Credit card accepted

At KS Mechanical Services we take great pride in our experience, expertise, quality and customer service we provide to meet the consumer?s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. KS Mechanical's expertly trained staff will work with you to design new systems for your home or office to keep within your budget. Our reputation is based on service, safety and quality, regardless of how large or small the job. **10% SENIOR CITIZEN DISCOUNT **FREE ESTIMATES FOR NEW INSTALLATIONS AND REPLACEMENTS **FINANCING AVAILABLE

1 neighbors recently requested a quote
Recommended by64%of homeowners
Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
4.4(
244
)
Gas Boiler or Radiator Heating System - Install

Serving Smithtown, NY and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"We are very satisfied with the work done by Varsity. They showed up on time both times, clean work and very conscientious workers. Knowledgeable of our boiler. Highly recommended by us."
Shower Fixtures
Installation
Truck
Best of L.I. Winner 2024
Angi 2022 Super Service Award Winner

+86

Response time11 hrs
136 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Excellent Plumbing & Heating
Excellent Plumbing & Heating
4.9(
28
)
Gas Boiler or Radiator Heating System - Install

Serving Smithtown, NY and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Excellent Plumbing and Heating arrived on time (good communication) and had to reset the toilet and replace that water valve, and then to turn off the main water line to replace that valve. Juan and Dimitri did a great job. Willing to work with you on pricing depending on scope of work to be done. Highly recommend."
Oil to Gas Conversion
Response time3 hrs
Response rate99%
Recommended by42%of homeowners
Absolute Zero Air Conditioning & Heating
4.8(
100
)
Gas Boiler or Radiator Heating System - Install

Serving Smithtown, NY and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"I highly recommend Absolute Zero. Kyle didnâ t try to sell me upgraded equipment, he sold me what works sufficiently and what he would install in his house. I got a few quotes for the central AC and his price was the lowest. Installed in the attic that will be renovated into a room, he worked with me and planned and installed the air handler unit and all the ductwork where heâ d leave the center of the room open and did a great, clean job. He said the AHU upstairs and condenser unit outside would be quiet, I was shocked at how quiet everything was. He protected furniture and floors while they worked and left the house clean and tidy after leaving. Iâ m extremely pleased with the work and have already referred him to others."
Response time7 hrs
8 neighbors recently requested a quote
Recommended by97%of homeowners
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Showing 1-10 of 263
Install Boiler FAQs, answered by experts

You should get anywhere from three to five quotes for HVAC replacement to get an idea of the average cost of a new unit. Although this quote-collecting process can be time consuming, it allows you to compare what work is required, what type of unit you should install, and how much you should expect to pay for the service.

Since your boiler keeps you warm and provides hot water to your home, you’re likely to notice issues with heating in your living space right away. The most obvious sign that your boiler is breaking is not getting any heat or hot water. You might also hear some odd sounds coming from your boiler during operation, the flame in your gas boiler is not blue, the pressure is inconsistent, or your boiler is using more energy than it should. If you notice any of these signs, be sure to call a pro right away.

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

The cost of heating oil fluctuates rapidly based on supply and demand, but the average price is between $4.00 and $4.50 per gallon, which means filling a standard 275-gallon tank would cost between $1,100 and $1,240. Much like automotive gasoline, the price of home heating oil changes constantly, so the only way to get an accurate and current price per gallon is to contact a heating oil delivery company. Some companies also offer contracts with a set price that should be an average cost over the contract term.

Common problems include leaks, low pressure, and inefficient heating. Regular maintenance prevents many issues.

The Smithtown, NY homeowners’ guide to boiler installation services

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