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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

“Brian, the tech, was very professional and had some great input. Thank you 👍👌😃” – Bob H.

Air Conditioner Installation in Grayslake, IL 60030

“Quality products, quality installations and very personal and professional team for every job. Reliable and extremely helpful”

– Robert B.

Air Conditioner Maintenance in Grayslake, IL 60030-1112

“We have been customers of Miller's for many years and would have no hesitation in recommending their company to anybody. Their technicians have always been professional, courteous and knowledgeable.”

– Mary C.

Air Conditioner Repair in Grayslake, IL 60030

“Very fast response to service call made 9/17/19 for a/c repair. Much appreciated.”

– Mike R.

Air Conditioner Repair in Gurnee, IL 60031

“You guys do a great job and take great care of your customers.”

– Bruce B.

Air Conditioner Maintenance in Volo, IL 60073

“Miller ways does great work at a reasonable price”

– Nancy W.

Air Conditioner Repair in Grayslake, IL 60030

“I’ve been using Miller’s Area Heating since 1990. All of the employees, whom I’ve ever had the pleasure to speak to or meet, have always been very professional, knowledgeable, and honest. I would recommend Miller's Area Heating to anyone! Thank you Miller’s for always doing a great job!”

– Scott F.

Air Conditioner Maintenance in Grayslake, IL 60030

“Work was done quietly and efficiently. The service rep provided information and options without upselling. Very satisfied.”

– Paul K.

Air Conditioner Maintenance in Mundelein, IL 60060

“Polite and efficient technician!”

– Kira H.

Air Conditioner Maintenance in Grayslake, IL 60030

“I like the thoroughness of each visit.”

– Diane 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.