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 Lindenhurst, IL 60046

“Tech arrived early, was thorough, explained all service he performed. Millers is a pleasure doing business with.” – David T.

Gas Furnace Replacement in Grayslake, IL 60030

“We have used Miller’s for 34 years and have always had excellent service. Their service and sales team is always very professional and answer any questions you might have. We highly recommend Miller’s!”

– Dan & Jan Q.

Gas Furnace Repair in Grayslake, IL 60030

“Maria was great at taking the details of my issue, up front about cost, and clear on times for expected arrival. Technician (Josh) was on time, professional, very knowledgeable and happy to explain repairs and cost. I wish their bill was itemized so I can review or ask questions. Overall great service. Would highly recommend!”

– Erin W.

Gas Furnace Repair in Grayslake, IL 60030

“Great job as always!”

– Jeannine Z.

Gas Furnace Maintenance in Gurnee, IL 60031

“Shane was great. Arrived on-time, cleaned and tested furnace. Was able to pay quickly and easily. Signed up for the comfort club and will be bringing Miller’s back out for the AC unit.”

– Noel R.

Gas Furnace Repair in Mundelein, IL 60060

“Josh (tech) was great and fast. He was able to diagnose the issue and replace/repair the part.

I will recommend to others.”

– Tristane T.

Gas Furnace Installation in Grayslake, IL 60030

“All personnel were courteous and professional.”

– Lynne P.

Gas Furnace Repair in Grayslake, IL 60030

“Always professional and effecient”

– Gary N.

Gas Furnace Maintenance in Grayslake, IL 60030

“Thank you for fast and thorough service. No problems at all.”

– Joanne F.

Gas Furnace Maintenance in Gurnee, IL 60031

“Great service. On time and no mess. Nice guy.”

– Robert E.

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.