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Best boiler installation pros near Guilford, CT

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TRUSTED BY GUILFORD, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon1.4k+
    Verified boiler installation services reviews

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

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

Serving Guilford, 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
1 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Tyler Heating, Air Conditioning and Refrigeration LLC
Tyler Heating, Air Conditioning and Refrigeration LLC
4.6(
132
)
Boiler or Radiator Heating System - Install or ReplaceElectric Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install+3 more

Serving Guilford, CT and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"Very please with the install. Vin was very professional and applied due diligence to the project. His oversight and instruction provided the reinsurance that needed. I requested four heating and AC vendors to provide proposals. Tyler was most responsive to my questions and offered me alternatives along with helpful suggestions. My next project is my boiler. I will be turning them in the future."
Carrier Ductless Heat Pump Condenser
Carrier Performance Ductless Heat Pump High Wall Air Handler
Additional Photos
Additional Photos
Additional Photos

+172

Response time2 days
Response rate100%
3 neighbors recently requested a quote
Avatar for MTL Heating & Cooling
MTL Heating & Cooling
4.7(
142
)
Gas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For BusinessOil Boiler or Radiator Heating System - Install+1 more

Serving Guilford, CT and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Prompt, efficient service --- Technically knows gas furnace products --- More importantly knows the economics of keeping up with repairs on a 30 year old unit vs going with a new unit --- Not a sales pitch -- just facts ---- Went new and the cost including nicely done installing was much lower than I originally thought it would be . Review by Clark D. in Madison CT"
 Viessman boiler oil to gas conversion Orange
Peerless oil boiler/Amtrol indirect water heater
 Navien Boiler oil to gas conversion Stratford
Day & Night gas furnace New Haven
 Peerless gas boiler West Haven

+4

Response time8 hrs
Recommended by98%of homeowners
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 Guilford, CT and surrounding areas

Approved

In business since 2014

Emergency services offered

Credit card accepted

"I lost heat in my home on Friday, this is after I had a local handy-man come on Thursday to bleed my pipes because of water flowing sounds in my base-board, which I also had done last year. I called and waited for the same handy-man to come back on Friday after his regular job and was then I was basically told by the handy-man he probably couldn't do anything further to get it running and recommended I contact a professional. It was now close to 5pm on Friday so I went online and found Select Mechanical Services and filled out the Home Advisor quick on-line question which included how urgent it was and instantly after I did, I received a telephone call from Gary at Select Mechanical and he came on Saturday morning, as I had told Gary I was using electric heaters, so I was okay for Friday night. I don't mean to repeat a previous high rating post, but again he was a great service man, knew his stuff, very friendly and kept me informed of the problems and issues at every stage. I will admit that I had not had my furnace professionally service/cleaned for a couple of years, so Gary had found more than one (1) problem and fixed them all! I highly recommend using Select Mechanical and a Professional."
Response time1 day
88 neighbors recently requested a quote
Recommended by90%of homeowners
Frisco Mechanical LLC
5.0(
16
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Guilford, CT and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

Frisco Mechanical is dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty, integrity and transparency. We specialize in central Air Conditioning and cooling systems as well as all types of heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

4 neighbors recently requested a quote
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Install Boiler FAQs, answered by experts

DIY is not recommended due to safety risks and technical expertise required. Hire licensed professionals.

It takes about five to 10 minutes for heat to reach a radiator, then about one hour until the radiator fully heats up a room. The exact duration depends on the size of the room and how far away the radiator is from the boiler heating system. Heating up an entire house could take up to two hours.

Many HVAC companies offer free quotes and free estimates for repairs and new HVAC systems. Others offer low-cost quotes or apply the cost of the estimates or diagnostics to your final bill if you hire them. Be aware that some companies advertise free HVAC quotes and recoup the costs by charging more for their services. Free HVAC quotes are never truly free—they cost the company time and effort—so be a good customer. Also understand that you may end up paying for free quotes in another way if you don’t hire a reputable company.

On average, you’ll need about two gallons of oil per day to heat your house when it’s 50 degrees Fahrenheit outside. Most oil tank capacity is about 275 gallons, and heating your house with two gallons of oil per day will last about four and a half months. This consumption will vary depending on the climate and average temperature in your location. For example, if the winters are longer and colder where you live, you’ll probably need to refill your oil tank at least once to get through the winter.

If you hear your radiator clanking even when it’s turned off, it’s typically because there’s trapped water or air in the system, causing a pressure buildup. When you hear significant clanking, popping, crackling, or banging in a radiator that’s turned off, you’ll want to bleed the pipes or call in an HVAC specialist to deal with the problem (and prevent it from happening in the future).

The Guilford, CT homeowners’ guide to boiler installation services

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