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

Avatar for Cawiamca Heating, Cooling, and Electrical
Cawiamca Heating, Cooling, and Electrical
5.0(
96
)
Oil Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+37 more

Serving South Lyme, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"The Cawiamca team was very quick to respond when my furnace went out before a storm and was able to provide a replacement furnace and completed the installation within 24hours. Great team and great service, and I will be reaching out to them with any other heating services that I need."
Variable Refrigerant Flow Cold Weather Heat Pump in East Lyme
VRF Cold Weather Heat Pump in Groton
Additional Photos
Additional Photos
Response time8 hrs
29 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Irie Energy Heating & Cooling
Irie Energy Heating & Cooling
4.9(
19
)
Ductless Mini-split Heating System - Install or ReplaceGas Boiler or Radiator Heating System - Install - For BusinessGas Furnace / Forced Air Heating System - Install+7 more

Serving South Lyme, CT and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Ryan was very knowledgeable, prompt, efficient, and personable. We chose two mini-split units (ductless), installed one upstairs, one downstairs. He installed the compressor unit outside in a discrete but easy to access spot. As Ryan assured me, both units are enough to make the entire house comfortable. Two heat waves into summer and I am delighted. Overall I am very pleased with my dealings with Irie Energy and I am especially pleased that he is LOCAL LOCAL LOCAL."
Mitsubishi
Mitsubishi
Mitsubishi
Mitsubishi
Mitsubishi

+14

Response time11 hrs
Recommended by89%of homeowners
AIR, Inc.
3.9(
352
)
Gas Furnace / Forced Air Heating System - InstallHeat Pump - Install or ReplaceGas Boiler or Radiator Heating System - Install

Serving South Lyme, CT and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"Our conversion to gas went smoothly. Air Inc. did a great job removing our oil tank and installing our new furnace and water heater. Sunil was the salesman who helped us complete the transaction and he was pleasant and respectful. However, he was somewhat persistent in making a sale and didn't discuss all our available options before we signed the contract. Several weeks later, we learned that other local companies provided a similar service at more affordable prices, but that one is on us for not getting multiple quotes. Nonetheless, the quality of the service was great and our equipment seems to be working well."
 Boilerw/Hot Water Heater
Carrier Gas Furnace Install
Central AC (carrier condenser)
 www.buderus.net
Central AC Install

+35

Response time7 hrs
42 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Atlantic Water Heater Pros
Atlantic Water Heater Pros
4.8(
51
)
Gas Boiler or Radiator Heating System - Install

Serving South Lyme, CT and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Hiring Williams & Assoc. has turned out to be one of the best decisions Iâ ve ever made! From the very start, this experience was excellent! Bruce and his team were professional, kind, and helpful when describing the system we purchased and answering the hundred questions we had along the way. Their attention to detail and all of the little extras one wouldnâ t even expect to receive were provided as if it were second nature to them. And the team worked tirelessly, without stopping until the job was finished. We were happy to have them in our home. These are genuinely good people. Our old boiler was past the point of being dangerous. Smoke filled the basement every time it came on. Anyone could see that we were in an emergency position and had no choice but to replace the old system. Some companies Iâ ve dealt with in the past would have taken advantage of our situation. But not Williams! The price for our new high efficiency heating system was very â veryâ reasonable. Due to our situation, the work was started and completed almost immediately and the service was excellent! My wife and I highly recommend Williams & Associates."
Large Mechanical Room
Response time1 day
Recommended by92%of homeowners
Avatar for Scotti Mechanical Services
Scotti Mechanical Services
4.7(
63
)
Ducts & Vents - Install or Replace

Serving South Lyme, CT and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Scott was wonderful to work with. He first tried to give me a self fix over the phone to same me a maintenance call. This did not work so I called Scott back to schedule an appointment. Scott came out the following morning and identified the issue was more complex after his own inspection. He fixed the issue and gave me some tips on self maintenance for my Heat Pump heating and cooling unit. I would highly recommend Scotti Mechanical Service and will definitely using Scott for future routine maintenance and/or other issues with my heating and cooling system."
Response time5 hrs
19 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Parker Mechanical Heating and Cooling
Parker Mechanical Heating and Cooling
4.8(
17
)
Heat Pump - Install or ReplaceGas Furnace / Forced Air Heating System - InstallOil Furnace / Forced Air Heating System - Install+43 more

Serving South Lyme, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"After another vendor recommended major repairs to a central AC system, so I called Parker Heating and Cooling to get another quote. Although I did not ask for a diagnosis, Jeremy inspected the system and discovered an overlooked minor problem, which he took care of. His diligence and honesty saved us thousands of dollars! Jeremy was very responsive and easy to deal with and checked back to make sure the problem was resolved. These days "five stars" has diminished in meaning, but this truly was excellent service!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+30

Response time4 days
Response rate100%
14 neighbors recently requested a quote
Avatar for EREG PROPERTY MAINTENANCE & MANAGEMENT
EREG PROPERTY MAINTENANCE & MANAGEMENT
5.0(
90
)
Thermostat - Install or ReplaceThermostat - Repair or Reprogram

Serving South Lyme, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"I returned home from a conference to discover my boiler leaking, leaving me without heat or hot water and concerned about potential damage. Steve, a highly skilled and friendly technician, clearly explained the scope of work and costs before getting started. He completed the repairs within a few hours, and the system is now working better than ever. I feel secure in my home again. Excellent work and a great overall experience."
Various Handyman Projects
Handyman Services Project
Plumbing Project
Handyman Services Project
Handyman Services Project

+4

Response time2 days
1 neighbors recently requested a quote
Recommended by70%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in South Lyme, 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 South Lyme, 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.