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Find Furnace / forced air heating system install or replace pros in O Fallon

Avatar for The Furnace Guys Heating & Cooling
The Furnace Guys Heating & Cooling
5.0(
7
)

Serving O Fallon, IL and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"Very quick response. Phillip knew what was wrong right away. He ran and got the part and had it fix in no time. Very knowledgeable and professional. We definitely use him again."
Installation
Installation
Installation
Installation
Installation

+2

Response time30 mins
Response rate100%
Recommended by83%of homeowners
Avatar for Vital Electric Heating and Cooling, LLC
Vital Electric Heating and Cooling, LLC
4.3(
19
)

Serving O Fallon, IL and surrounding areas

Approved

In business since 2006

Emergency services offered

Small jobs welcome

"They were the only one that were able to come out on a Sunday. Found the problem and got our ac working during a heat advisory. Very satisfied with the results and will continue to use them again. Will recommend them to friends and family."
Full system install
Response time10 hrs
17 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Aire Serv of St. Louis
Aire Serv of St. Louis
5.0(
5
)

Serving O Fallon, IL and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Looking for reliable HVAC service in St. Louis? Aire Serv of St. Louis is your local expert for residential and commercial heating and cooling. From emergency AC repair during humid Missouri summers to furnace maintenance before the winter chill, our professional technicians are available to keep your home comfortable. We pride ourselves on transparent, upfront pricing, no overtime charges, and the "Done Right Promise." Whether you need a system replacement, duct cleaning, or a routine tune-up in Fenton, Webster Groves, or Kirkwood, we are the team you can trust. Breathe easy with Aire Serv—your comfort is our top priority. Call us today to schedule your service!

Logo
30 neighbors recently requested a quote
Avatar for Mr. Handyman Metro East
Mr. Handyman Metro East
4.6(
196
)

Serving O Fallon, IL and surrounding areas

Approved

In business since 2000

Warranties offered

Small jobs welcome

"Excellent. I called 6 places and only Mr Handyman would help. The office staff was so helpful and worked to get us help. The repairman that came out was very professional and knowledgeable. As importantly he was very considerate of my elderly father. Wonderful service."
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+5

Response time1 day
Response rate92%
Recommended by95%of homeowners
Avatar for Morrison Plumbing, Heating, Air & Electrical Services
Morrison Plumbing, Heating, Air & Electrical Services
5.0(
5
)

Serving O Fallon, IL and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

Your home's plumbing, HVAC, and electrical systems keep your family comfortable and safe. When something goes wrong or you're ready to upgrade, Morrison Plumbing, Heating, Air & Electrical is the Metro East team that delivers same-day service, upfront pricing, and work you can count on.\n\nWe serve Caseyville and surrounding communities through hot, humid summers and cold Illinois winters. Our technicians are licensed, insured, and trained to repair and install heating, cooling, plumbing, and electrical systems so your home stays reliable year-round.

HVAC Maintenance
Air Conditioner
Heating Repair
AC Service
HVAC Repair

+6

28 neighbors recently requested a quote
Avatar for The Steven Brand
The Steven Brand
4.9(
70
)

Serving O Fallon, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Emergency services offered

Small jobs welcome

"Steven’s work is phenomenal! Very responsive, prepared, quick and did a great job mounting my tv. He even patched holes that were in my wall. Definitely exceeded my expectations. I will definitely utilize his services again."
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+1

Response time2 days
1 neighbors recently requested a quote
Recommended by65%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in O Fallon, IL

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 O Fallon, IL 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.