Furnaces

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Miller's Area Heating is the leading HVAC company in Grayslake, IL, 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.

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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 Grayslake, IL 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 Miller's Area Heating, and we can set up an appointment to calculate the furnace size you might need.

Need Furnace Service?

Contact the experts at Miller's Area Heating.

Call us at 847-223-0211!

Gas Furnace Maintenance in Grayslake, IL 60030

“Corey was very professional and arrived during my appointed time time frame.” – Kathy S.

Gas Furnace Maintenance in Lake Villa, IL 60046

“I received a call from Miller’s that Josh the technician was on his way around 11am. He arrived about 15 minutes later. He put on his booties and wore his mask and introduced himself before coming in. I showed him where the Furnace/AC unit was located. He confirmed he was going to do annual maintenance on both units. He got right to work and did all the maintenance including the outside AC unit. He was here for about an hour to service everything. He was thorough, efficient and polite. Everything went smoothly. Thanks Josh and the Miller’s team!”

– Gloria K.

Gas Furnace Maintenance in Grayslake, IL 60030

“Service was on time and thorough as usual. All questions were answered.”

– John and Maureen J.

Gas Furnace Maintenance in Hainesville, IL 60030

“The gentleman was polite and pleasant. He worked quickly.”

– Marie B.

Gas Furnace Maintenance in Ingleside, IL 60041

“Everything was done satisfactory. Very professional. Just wish there was a discount for reoccurring customers. Overall very happy with services performed.”

– Frank W.

Gas Furnace Maintenance in Grayslake, IL 60030

“Professionail and thorough – serviced my heater, A/C and Aprilaire. Very happy with their work.”

– Angela S.

Gas Furnace Repair in Grayslake, IL 60030

“Quick response to a scary experience. Efficient diagnosis of the problem. Jo”

– Mary R.

Gas Furnace Installation in Ingleside, IL 60041-9649

“Installed new gas furnace, a/c, and water heater. Shut off handle touching exhaust piping. Recommend relocate. Also gas line to water heater used flex-hose in stead gas line piping. Recommend reinstall”

– Ted Z.

Gas Furnace Maintenance in Grayslake, IL 60030

“Joe was very helpful and knowledgeable and would love to have him out again.”

– Michael M.

Gas Furnace Repair in Fox Lake, IL 60020

“We were concerned over the odor of natural gas. The service man was out within an hour, was pleasant and efficient. Couldn’t ask for better service.”

– Stephanie V.


Miller's Area Heating proudly provides HVAC service to Grayslake, Libertyville, Round Lake, Wildwood, Ingleside, and the surrounding Illinois communities. Visit our service area page for more coverage details, call us at 847-223-0211, or request service online today.