Gas Furnaces

Furnace service.

AL-DON Indoor Air Quality Specialists is the leading HVAC company in Creve Coeur, MO, for your furnace service needs. We service and repair all makes and models. If you need furnace service, we are the company to call. Our skilled technicians are qualified to solve just about any repair or installation that you throw at us.

How Much Money Can a New Furnace Save You?

Our AFUE energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's AFUE value and compare it to a newer, more efficient system. You can even customize it to better match your home's system for a more accurate calculation.

AFUE Energy Savings Calculator

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This calculator does not guarantee actual costs or savings and is only to be used for educational purposes.

Customize to Your Home

Adjust these settings for a more accurate calculation:




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Historical Comparison

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** Data from U.S. Energy Information Administration
*** Data from 2002 EPA study

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Furnace Repair

Don’t get left in the cold! Is your furnace acting up, blowing cold air, or making too much noise? Our experienced team of professionals is here to keep your home warm and cozy. We repair all makes and models, and we will never try to sell you a service that you don’t need. Our technicians are honest and hard working, and we’re always transparent and fair about the work we do.

Furnace Replacement

Sometimes a repair is not sufficient to fix your furnace. Sometimes a new furnace is the most cost-effective and energy-efficient way to go. We will always be honest with you about a possible furnace replacement. We value our time and your money––we don’t want to perform repairs or service on an appliance that is in need of replacement.

If you do need a furnace replacement, we know how overwhelming it can be. Here are some of the frequently asked questions about furnaces that we get from some of our Creve Coeur, MO residents:

What Are The Different Types Of Furnaces?

Single Stage: A single-stage furnace has only one stage of operation. It can either be turned on or turned off.

Two Stage: A two-stage furnace has two settings––full and half speed. This is a more efficient way to heat and provides for better comfort, because it can move the air at a slower pace.

Variable Stage or Modulating: A variable-stage or modulating furnace modulates the speed and heat output based on the temperature outside and the desired comfort level. This furnace only works as much as you need it, making this type the most energy-efficient type of furnace.

What Is AFUE?

AFUE, or Annualized Fuel Utilization Efficiency, is a measure of furnace-heating efficiency. The higher the AFUE, the more efficient the furnace.

What Size Furnace Do I Need?

We can calculate the correct size furnace for your home. The number of BTUs, or British Thermal Units, needed to heat your home is dependent on a number of variables. Contrary to what you might think, a bigger furnace may not necessarily mean more heating power for your home. Call us at AL-DON Indoor Air Quality Specialists, and we can set up an appointment to calculate the furnace size you might need.

Gas Furnace Maintenance in Mehlville, MO 63125

“Ryan from Al-Don came out to service our furnace on November 3rd, to get it ready for the upcoming heating season. He did a thorough exam and cleaning of the furnace, humidifier and the fue. He let us know that the blower motor may need to be replaced at some point, but did not feel it was necessary at this time. He gave us an idea on the costs of replacing the blower when the time came. We never felt like there was any pressure that it had to be done right away. He also gave us suggestions on how to save money on our heating bill. We were very happy with this service call. It was a pleasure meeting Ryan, and hope he is available the next time we need service. Thank you.”
- Art S.

Furnace Installation in Rock Hill, MO 63119

“We are just getting started with a renovation, but I am totally satisfied with the outstanding character of everyone I have talked to!”

– Doris M.

'- Doris M.

Furnace Repair in Chesterfield, MO 63017

“Great service! Thank you for quick response.”

– Ron M.

'- Ron M.

Furnace Repair in St. Louis, MO 63123

“Alex came same day to fix my heat as it went out. He was knowledgeable, intelligent, respectful and fixed my issue within 5 mins of arriving. Alex is definitely an asset to your organization. Great job!”

– Ryan M.

'- Ryan M.

Furnace Maintenance in Chesterfield, MO 63017

“Excellent and professional service as always!”

– Melissa D.

'- Melissa D.

Furnace Repair in St. Louis, MO 63123

“Alex was wonderful. He started working immediately and didn’t stop til both jobs (the furnace and the water heater ) were completed. He was polite to me and cleaned up beautifully. Super person!! He knows what he is doing.”

– Dorothy M.

'- Dorothy M.

Furnace Repair in St. Louis, MO 63049

“Were on time, even several minutes early. Spent a legnthy time diagnosing issue. Faulty part installed as soon as it was in.”

– Thomas R.

'- Thomas R.

Furnace Maintenance in St. Louis, MO 63128

“Ryan was very professional and very pleasant!”

– Terri B.

'- Terri B.

Furnace Maintenance in Ballwin, MO 63021

“Always satisfied with service. (Have used them for years)
Owner/Office personnel and Service Technicians are wonderful.
I would never consider using anyone else. All involved are friendly and helpful.
Would recommend Al-Don to everyone.”

– Mary B.

'- Mary B.

Furnace Maintenance in Creve Coeur, MO 63146

“Ryan was prompt, professional, and courteous throughout the maintenance process. Thank you!”

– Elizabeth C.

'- Elizabeth C.

Furnace Maintenance in Kirkwood, MO 63122

“Good job.”

– Marian B.

'- Marian B.

Need Furnace Service?

Contact the experts at AL-DON Indoor Air Quality Specialists.

Call us at 314-567-5585!