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Top-Rated Furnace / forced air heating system install or replace pros in Greenwich - Updated Nov 2026

Avatar for MSD Heating & Cooling
MSD Heating & Cooling
4.9(
74
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+43 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"I was very happy with my experience using this company. In the middle of a heat wave, right before the July 4th holiday, my AC stopped working. The man who installed it and had been servicing it was too busy to come for a week. I called MSD and was given an appointment for 8 AM the next morning. They were prompt and courteous, fixed my problem, and were reasonably priced. I will be calling them in the future."
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+1

3 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Royal Comfort
Royal Comfort
5.0(
18
)
Gas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+41 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"These guys are great. They came to assess the situation (problems with our oil furnace) and thoroughly reviewed options. We went with them for a furnace replacement, as well as a heat pump to replace our standard a/c units. They came in much cheaper than the two other companies we consulted (one of which we had used for almost 50 years (since the house was new). We're thoroughly happy with our new HVAC setup, and even the fancy Nest thermostat. Highly recommended!"
The new Bryant 16 SEER2 Unit
Look at all those Mitsubishis!
The new boiler & tank to keep these folks warm for many years to come!
The old broken unit
Additional Photos

+6

Response time3 days
10 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Electric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - RepairHeat Pump - Install or Replace+43 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"We were desperate to find someone to repair our central air conditioning unit. We were not able to move into the house and everyone that we called was not able to accommodate us because of the recent heat wave. All Weather was able to get a technician to us within 2 days. Nuri was amazing and showed my husband how everything worked and what repairs needed to be done. By the time he left, we had a cool house and were able to set up our movers. Thanks to Angie’s list, I found a reputable company that was reliable and efficient. We can rest easy! Thank you!!!"
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+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for H L Bowman
H L Bowman
4.6(
428
)
Gas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+9 more

Serving Greenwich, CT and surrounding areas

Approved (Corporate)

In business since 1946

Free estimates

Emergency services offered

"Great experience Justin, Nate & Timothy were awesome. Very knowledgeable, professional & curious. Aside from the cleanliness they delivered an experience. I highly recommend HL bowman if you want rapid service on your HVAC. Pricing was reasonable in my opinion & financing is an option. Keep in mind when seeking quotes for your HVAC repair/ new install you must consider performance over equipment, that is if your want a good system that will have a good run/life span."
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+6

478 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Kelley's Heating & Cooling, LLC
Kelley's Heating & Cooling, LLC
4.9(
11
)
Heat Pump - Install or ReplaceDucts & Vents - Install or ReplaceElectric Furnace / Forced Air Heating System - Install+19 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"We received excellent service from Kelleyâ s Heating & Cooling when our air handler was preventing our heat from coming on. Ryan was prompt, friendly, knowledgeable, and reassuring. He assessed and repaired the system in a short amount of timeâ we highly recommend Kelleyâ s Heating and Cooling. Top-notch service."
Response time1 day
12 neighbors recently requested a quote
Recommended by72%of homeowners
Avatar for Bell Mechanical, LLC
Bell Mechanical, LLC
4.0(
111
)
Electric Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceBoiler or Radiator Heating System - Install or Replace+43 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"They came out and gave an estimate for a new boiler and we contracted with them for the replacement. The technicians seemed very knowledgeable and thorough. We had a few issues after the installation with air getting in the line and blocking the flow of hot water. However, Our installation came with a 1 year service contract and they returned to remedy the problem promptly and professionally. Bell stands behind their work. We would recommend Bell and will use them in the future."
Westchester Heat Pump
Westchester Heat Pump
Westchester Heat Pump
BBB Rating A+
Mitsubishi Diamond Dealer

+4

Response time2 days
8 neighbors recently requested a quote
Recommended by84%of homeowners
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Showing 1-10 of 437

FAQs for furnace / forced air heating system install or replace projects in Greenwich, CT

Converting from an oil furnace to an electric furnace isn't a simple swap—the oil system needs to be completely removed before installing the electric furnace. You'll need a full electric system installation, but you might be able to reuse existing ductwork if it's up to current safety standards. You’ll need to budget for a new electric furnace installation, which costs between $1,800 and $6,200, including professional removal, proper disposal, and safe installation of the new system.

Electric furnaces are 100% efficient at converting electricity into heat. However, some of that heat can be lost as it travels through your home's ductwork or escapes through poorly insulated areas. That's why regular duct maintenance and proper home insulation are important to maximize your furnace's efficiency and reduce heat loss, ensuring consistent warmth and lower energy costs.

With proper maintenance, an electric furnace can last anywhere from 20 to 30 years, outlasting the average gas furnace's lifespan of 15 to 20 years. To keep your electric furnace running efficiently, schedule regular cleanings, tighten connections, and have inspections done before winter arrives. With routine maintenance, you’ll ensure consistent, safe heating for years to come.

The size of the electric furnace you need depends on factors like your home's square footage, climate, and insulation quality. As a general guideline, those who live in warmer climates should multiply their square footage by 30 to 35 BTUs, while those in cooler areas should multiply it by 50 to 60 BTUs.

Consulting with an HVAC professional can help you determine the exact size that's right for your home.

An electric furnace works by converting electricity into heat using high-resistance heating elements. A blower then pushes the warm air through your home's ductwork, distributing heat evenly throughout your space. Since there's no combustion involved, electric furnaces eliminate the risks associated with gas furnaces and provide consistent, reliable heating when properly installed.

An electric furnace uses between 40 and 80 kilowatts per day to heat your home. The exact amount it uses depends on factors like your home's size, insulation, and overall energy requirements. Larger homes or those with poor insulation use more energy than smaller, well-insulated spaces. A professional furnace assessment can help confirm the ideal unit size for your needs.

The Greenwich, CT homeowners’ guide to furnace / forced air heating system installs or replaces

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