Air Conditioning


Miller's Area Heating is your #1 HVAC contractor in Grayslake, IL and the surrounding communities. We are the leading company for all of your air conditioning needs. If you need repairs, maintenance, or a brand new system installed, the technicians at Miller's Area Heating are the qualified and professional crew for the job.

We provide the highest quality service for your air conditioner. We also aim to educate and inform our customers. Informed decisions are good decisions. We want you to feel confident we are qualified to perform the service for which you are hiring us.

How Much Money Can a New Air Conditioner Save You?

Our SEER energy savings calculator can help determine how much you could save on your utility bills. Simply enter your current unit's SEER 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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Air Conditioning Basics

The four main components to your air conditioner are:

Condenser: The condenser is the outside metal unit and where the gas from the compressor is condensed into a liquid. The gas entering the condenser is very hot. The temperature is then lowered, so the gas can convert back to a liquid.

Compressor: The compressor is inside the condenser. It circulates the pressurized refrigerant, to concentrate the heat, and changes the low pressure gas to high pressure.

Evaporator: The evaporator is the part of the system inside the home. In simple language, it absorbs the heat from your home.

Expansion Valve: The expansion valve controls the amount of refrigerant in your system.

All of these pieces are connected by a copper tube that handles refrigerant, creating a closed loop. Heat is collected in the evaporator, sent outside to the condenser. The heat is removed, and the cool air is recirculated back into your home.

AC Facts

An Air Conditioner Doesn’t Create Cool Air.
What happens in the AC process is actually the removal of heat from the air. Your AC uses a chemical called refrigerant to remove heat and transfer it outside. The warm air runs through the lines and coils in your unit and goes from liquid to gas and back again. During this process, the refrigerant removes the heat and transfers it elsewhere so that when the air comes out the other side, it is cool.

Your AC Will Remove Humidity.
Lower humidity helps the overall comfort level in your home by making you feel cooler, even if the temperature is the same.

Your Air Filter Needs To Be Checked And Replaced Every Three To Six Months.
(depending on the manufacturer’s recommendations)
A dirty air filter restricts your air flow, which reduces efficiency, costing you money, and over time can put stress on your unit and could cause a costly repair.

Maintenance, Maintenance, Maintenance.
Your air conditioner needs regular checkups to keep it running in tip-top shape. Having regular annual preventative maintenance will bring your system longer life and fewer breakdowns over all.

The Seasonal Energy Efficiency Ratio (SEER) measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.

At Miller's Area Heating, we provide all the services you need to keep your AC running in top-notch shape. Call us at 847-223-0211 for repairs, maintenance, or new-system installation.

Need Air Conditioner Service?

Contact the experts at Miller's Area Heating.

Call us at 847-223-0211!

Air Conditioner Maintenance in Grayslake, IL 60030

“Corey was very knowledgeable. Did a great job. Friendly” – Don S.

Air Conditioner Repair in Grayslake, IL 60030

“This is my second time that I asked for service and same day service. The technician Cory Schuardt was very friendly and gave a great advise reference to my AC system. Thank you very much”

– Rafael S.

Air Conditioner Maintenance in Grayslake, IL 60030

“Shane was very knowledgeable and did a great job”

– Watana P.

Air Conditioner Maintenance in Gurnee, IL 60031

“Everything was done is a pleasant, professional manner.”

– Mary B.

Air Conditioner Maintenance in Grayslake, IL 60030

“Your service representative, Josh, was prompt, polite, and efficient.
I have done business with Miller’s Area Heating and Air Conditioning for many years and will continue in the future.”

– John S.

Air Conditioner Installation in Gurnee, IL 60031

“I have never before written a review prior to someone asking me to, but the service from Miller Heating was so exemplary that I am excited about doing so.
Our air conditioner broke during the hottest days of the year(of course). We knew our AC unit was old and would need to purchase a new one. Kevin was at my house within 2 hours of me calling. He was honest with me about which AC unit would work with our furnace, not trying to sell me a more expensive unit that wouldn’t work. At the time, he told me it may take a week and a half to get the new one installed. Knowing that it was going to be hot, he came back to our home and tried to get the old AC unit running for us until the new one could be installed. It did not work, so the next morning , he had someone bring us a portable unit! Less than 48 hours later, they were able to install our new AC and had it up and running by 11am on a Saturday morning!
Every person we dealt with were so nice and professional. They cleaned up every piece of scrap from the installation. Kevin has texted or called each step of the way to make sure everything was done correctly. Miller Heating is exactly how a business should be run…top notch! Did I mention that their price was less than other quotes we received? We will never use anyone else for our heating/cooling needs.”

– Melissa P.

Air Conditioner Maintenance in Round Lake, IL 60073

“Always top-notch service!”

– Kelly L.

Air Conditioner Maintenance in Grayslake, IL 60030

“Good and thorough technician.
Friendly and courteous.”

– Philip P.

Air Conditioner Repair in Grayslake, IL 60030

“The gentleman who arrived to fix our air conditioner was extremely courteous and efficient.”

– James T.

Air Conditioner Repair in Round Lake, IL 60073

“the repair person was friendly, and arrived early, also knowledgeable. Repaired problem very quickly.”

– Kenneth D.

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.