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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

Find Boiler installation pros in Guilford

Avatar for Cawiamca Heating, Cooling, and Electrical
Cawiamca Heating, Cooling, and Electrical
5.0(
93
)
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

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Ron was on time, made great options with good reasoning behind layout of installing Mini Split Air Conditioning Units. Same day estimate sent via email with breakdown of cost. Installed right away and done in one day. The crew was very professional and easy to work with. I would recommend Cawiamca to anybody in need of AC installation in fact I already did to my niece."
Variable Refrigerant Flow Cold Weather Heat Pump in East Lyme
VRF Cold Weather Heat Pump in Groton
Additional Photos
Additional Photos
Response time8 hrs
31 neighbors recently requested a quote
Recommended by94%of homeowners
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
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

"I always trust Chris as my technician to deliver superb service re: my furnace/boiler, hot water tank, split A/C system, and dehumidifier. It's a pleasure to greet him semi-annually, since he's courteous, pleasant, and professional, and since he answers all my questions re: my heating and cooling systems. I trust this talented tech being inside my home and tuning up all these systems. Kudos to Tyler Heating & A/C for hiring Chris as its employee."
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%
7 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 - InstallGas Boiler or Radiator Heating System - InstallElectric 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

"Furnace boiler would not start. Appointment was available the next day. Eric diagnosed faulty gas valve. Part was back ordered so took extra days. He replaced gas valve and furnace started but it did not start the next cold day. Turned out he should also have replaced the thermocouple. He came the same day when I called and was able to complete the repair at no additional charge. They stood behind their work and are a high quality firm but repair in one visit would have been better. Eric was very pleasant and professional and readily acknowledged his misjudgment."
Response time1 day
90 neighbors recently requested a quote
Recommended by90%of homeowners
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Install Boiler questions, answered by experts

Installing a boiler requires training, a specific skill set, and extensive experience. Boiler installation can be extremely dangerous, as it involves working with water lines, gas lines, and electricity. For this reason, it’s strongly recommended that you hire a professional to install your boiler. Some states even consider it illegal to work on a boiler without the proper licensing.

Costs depend on system size, efficiency rating, and additional features like zoning or smart controls.

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.

Due to fuel line connections and venting complexity, professional installation is required for safety and efficiency.

The absence of heating or hot water, unusual noises like banging or gurgling, and visible water leakage are key signs. Abnormal boiler pressure, flame irregularities (for gas boilers), or pilot light issues may also signal trouble. Frequent cycling, soot or staining, and unusual odors, particularly gas-like smells, should not be ignored. Modern boilers often display error codes or lockout mode upon detecting issues. Uneven heating across radiators and rising energy bills without increased usage can further point to problems. Prompt attention to these signs is essential to prevent further damage and ensure safety.

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.