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

Avatar for Fresh Air Heating & Cooling
Fresh Air Heating & Cooling
4.8(
276
)

Serving Defiance, MO and surrounding areas

Approved

In business since 1947

Free estimates

Emergency services offered

"This company was excellent all the way around. The staff member who contacted me was very nice and helpful. They were able to come out the same day (I did not have heat). They sent me a text message with a picture of the technician which I thought was an excellent feature. The technician, Jeff, was very nice and extremely knowledgeable. I would definitely hire them again because the work was top quality and the cost was fair and reasonable."
Fresh Air Van
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+2

7 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Liberty Heating & Cooling
Liberty Heating & Cooling
4.8(
46
)

Serving Defiance, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Emergency services offered

Warranties offered

"Called Sam on Friday for quote for water heater replacement. Said he could do Monday afternoon or Tuesday morning. Received call Monday morning to see if he could come on over to do replacement, what a pleasant surprise! Sam arrived shortly after with water heater we discussed & all supplies needed , no running around to pickup stuff. Job completed in timely manner. Old unit hauled off and job site all cleaned. That’s a big deal to me. Will not hesitate to recommend Liberty to friends & relatives ! Thanks Sam , Dave & Roxanne"
A/C replacement
Additional Photos
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+10

6 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Hosack Plumbing Heating & Cooling
Hosack Plumbing Heating & Cooling
4.8(
344
)

Serving Defiance, MO and surrounding areas

Approved

In business since 2009

Warranties offered

Credit card accepted

"Glen was great. He explained everything he was doing as I watched so I could learn how to drain the water heater myself. He checked the pressure in all the faucets & cleaned up afterwards. I’d definitely hire Hosack again...and request Glen."
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+2

Response time6 days
8 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Cond
Dunn Plumbing, Heating and Air Conditioning / Dunn One Hour Heating and Air Cond
4.7(
272
)

Serving Defiance, MO and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Robert did a great job in checking out my furnace that wasn't operating and provided me with the next steps I needed to take with the gas company. I can't say enough good things about Robert. He was so extremely helpful and informative. I'm a delighted customer and am glad I have Dunn for my heating and cooling needs."
Additional Photos
Response time2 days
25 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Chowning Heating & Cooling
Chowning Heating & Cooling
4.2(
35
)

Serving Defiance, MO and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Justin at Chowing Heating and Cooling is who I would recommend you request! He is on time, courteous, and knowledgeable and he will take the time to explain what is going on with your system and answer your all questions. He will explain how things work and he went above and beyond for my clients. I will request Justin for every buyer and seller I have. The girls in the office are also extremely helpful. Karen Davis Tucker/CBG"
Response time2 days
Response rate89%
12 neighbors recently requested a quote
Avatar for Aire Serv of St. Louis
Aire Serv of St. Louis
5.0(
5
)

Serving Defiance, MO 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!

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35 neighbors recently requested a quote
Avatar for Arrow Mechanical
Arrow Mechanical
4.5(
61
)

Serving Defiance, MO and surrounding areas

Approved

In business since 2017

Emergency services offered

Warranties offered

"David at Arrow Mechanical responded to my call on a Sunday morning. The Blower was blowing but no cooling. House was getting quite warm. He responded on a Sunday at regular pricing and completely restored the A/C within an hour, replacing a compactor on the outside unit. he found the problem quickly after thoroughly reviewing the furnace; then checking the outside unit. He is a very knowledgeable HAVC guy; also very courteous and polite...he definitely is a 5-star technician...if he keeps going, he'll be one of the best !"
Commercial refrigerator
Geo thermal
New water pressure tank and electric water heater
New electric water heater
Response time6 hrs
Response rate85%
Recommended by96%of homeowners
Avatar for SC Hosack Plumbing & Excavating
SC Hosack Plumbing & Excavating
4.8(
104
)

Serving Defiance, MO and surrounding areas

Approved

In business since 2006

Emergency services offered

Warranties offered

"They installed a new water heater for us. They were very efficient. Did not leave a mess. And we have been very happy with the water heater that we bought from them."
 30% tax credit
Vanity Bowl
Steam Shower
Kitchen
 Go Green

+3

6 neighbors recently requested a quote
Recommended by97%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Defiance, 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 Defiance, 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.