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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 Round Lake Beach, IL 60073

“Technician was very friendly, followed Covid-19 guidelines and performed a thorough job.” – Dominic D.

Air Conditioner Maintenance in Grayslake, IL 60030

“As usual, your service man was on-time, courteous, knowledgeable. We appreciate your assistance.”

– Michael C.

Air Conditioner Maintenance in Lake Forest, IL 60045

“Great service from a great company!”

– Gus B.

Air Conditioner Repair in Grayslake, IL 60030

“Prompt service, very professional. I've had emergency service twice in 90 degrees and both times they were able to come out within a matter of hours and fix the problem quickly. Would definitely use and recommend.”

– Barbara D.

Air Conditioner Maintenance in Ingleside, IL 60041

“Technician did a great job, was very courteous and very informative when answering questions we had for him.”

– Marilyn S.

Air Conditioner Maintenance in Lindenhurst, IL 60046

“Very polite and helpful with my questions”

– Edith G.

Air Conditioner Maintenance in Grayslake, IL 60030

“Excellent service.”

– Jaclyn P.

Air Conditioner Repair in Gurnee, IL 60031

“Always amazing service! AC stopped working last night, called this morning (Sunday) and someone was out within an hour. He found the problem, fixed it and we had cold air in 30 mins. Always professional, honest, and fast!!! Can’t say enough good things about Miller!!!!”

– Brianna B.

Air Conditioner Maintenance in Grayslake, IL 60030

“Great service, as always!”

– Shawn V.

Air Conditioner Maintenance in Grayslake, IL 60030

“Technician came promptly and did a thorough inspection . He was polite and friendly and wore a mask and, also, foot protective coverings when in my house. I had to change my original appointment and the woman who did the rescheduling was also very friendly and polite and very helpful.
I would recommend Miller's.”

– Kathleen K.

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.