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

Avatar for Fresh Air Heating & Cooling
Fresh Air Heating & Cooling
4.8(
277
)
Gas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+43 more

Serving Foristell, MO and surrounding areas

Approved

In business since 1947

Free estimates

Emergency services offered

"I had another company diagnose a compressor failure on my 9 year old heat pump. I decided to get a new heat pump. After calling around and getting quotes I went with Fresh Air because they sell name brand products and were very responsive and punctual unlike all other companies I got quotes from. The technician was on time and kept me involved in the install/testing process. It's rare to have a good experience from the service industry, but Fresh Air delivered with no surprises."
Fresh Air Van
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+2

14 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Liberty Heating & Cooling
Liberty Heating & Cooling
4.8(
46
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+23 more

Serving Foristell, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Emergency services offered

Warranties offered

"Sam was great. Had a extremely dirty system that would not function correctly or blow cold air. Had High Ridge Heating and Cooling here as he has done work before for me and parents. He took one look and stated we needed to replace entire a/c furnace unit for $3100. Told us it would cost about the same to clean. No way I could afford that so went on Angie's List to find someone and read Sam's review's. He came out and told me the cost at $425 to clean. Which was fantastic. He spent about 2 1/2 to 3 hours and did a wonderful job. Ended up paying total $625 once he was done and asked me before doing anything additional that would cost more. Also since our unit didn't have valves on system to reuse our refrigerant he had to put new in which was part of price increase. Sam, thanks so mich for not trying to take advantage."
A/C replacement
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+10

6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Schraer Heating and Air Conditioning
Schraer Heating and Air Conditioning
5.0(
8
)
Gas Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+28 more

Serving Foristell, MO and surrounding areas

Approved

In business since 1946

Free estimates

Emergency services offered

"The 3 Mustache Pledge! Schraer Heating and Cooling deserves every bit of praise I can give! I called them about a worrisome noise coming from my system — one that I could only describe through a few rather vague and comical sound effects. Despite my less-than-technical explanation, their technician quickly understood exactly what I meant, found the issue, and had it fixed in no time. Their professionalism, responsiveness, and ability to solve the problem so efficiently (and with good humor!) made the whole experience stress-free. I’m so grateful for their excellent service and expertise. Highly recommend Schraer Heating and Cooling to anyone looking for honest, skilled, and friendly professionals! I will definitely keep my maintenance agreement in full force and effect!"
Airlift rooftop unit
Duct installation
Geothermal job
Crane lift a rooftop unit
Finalize duct on a new construction

+3

Response time1 day
53 neighbors recently requested a quote
Avatar for All American Appliance Service Inc
All American Appliance Service Inc
4.5(
531
)
Thermostat - Repair or Reprogram

Serving Foristell, MO and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"A few minutes after requesting a quote, I got a call and scheduled a service visit this same morning. The technician was very friendly, professional, and quickly addressed the issue by replacing our broken bake ignitor."
Additional Photos
Response time2 days
2 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Hively Home Comfort LLC
Hively Home Comfort LLC
4.8(
49
)
Gas Furnace / Forced Air Heating System - RepairElectric Furnace / Forced Air Heating System - RepairHeat Pump - Repair or Service+1 more

Serving Foristell, MO and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

4 neighbors recently requested a quote
Recommended by64%of homeowners
Avatar for Chowning Heating & Cooling
Chowning Heating & Cooling
4.2(
35
)
Gas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+3 more

Serving Foristell, MO and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"These guys are the best! We called all of the "big" companies and these guys were about half the price. The weather was hot, and our air conditioner was blowing hot air. Called and they came out that day. Service was great. They replaced our air conditioner and furnace in under 4 hours. Showed us how everything worked, cleaned up, and were on their way. We would recommend them to everybody we know, and have!"
Response time2 days
Response rate100%
11 neighbors recently requested a quote
Avatar for On Time Experts
On Time Experts
4.8(
104
)
Electric Furnace / Forced Air Heating System - RepairGas Furnace / Forced Air Heating System - Repair

Serving Foristell, MO and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

When your home needs help, count on the team that does Whatever It Takes to make it right. On Time Experts Heating, Air & Plumbing, formerly Hosack Plumbing, Heating & Cooling, now brings together the experience of Hosack and Al-Don. We provide trusted heating, cooling, plumbing, and air and water quality services throughout O’Fallon and the Greater St. Louis area.

Recommended by97%of homeowners
Avatar for Show-Me Comfort LLC
Show-Me Comfort LLC
5.0(
5
)
Ductless Mini-split Heating System - Install or ReplaceGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+10 more

Serving Foristell, MO and surrounding areas

Approved

Hello, My Name is Johnathan Steele, Owner Operator of Show-Me Comfort Heating and Air Conditioning. I started my company with the intent to help and show transparency to my customers and to educate them to the best of my abilities on the system that keeps their Home Comfortable. Most Companies will come in to a house fix the issue then leave… That’s where we try and separate ourselves by finding the culprit, educating our customers on why it happened and how to prevent future problems. \n\nWe at Show-Me Comfort Heating and Air Conditioning take pride in our work, and if we wouldn’t do it in our house we wouldn’t do it to yours.

14 neighbors recently requested a quote
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FAQs for furnace / forced air heating system install or replace projects in Foristell, MO

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 Foristell, MO 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.