QUALITY. VALUE.
INTEGRITY.

THE HOME COMFORT EXPERTS YOU CAN
TRUST FROM START TO FINISH

Service vehicle for Illiana Heating & Air Conditioning in Cedar Lake, IN.

When those cold Midwest winters come rolling through, a heating system expertly installed will reliably keep your family warm and energy bills low.

With our professional service and installation, you can expect a system that offers exceptional home cooling and comfort with quiet operation and efficiency.

Increase your efficiency, lower your bill, and control your home’s temperature from anywhere. Breathe a breath of fresh air with quality products.

The BEST way to keep your home comfortable! Extend the life of your existing system with a precision tune-up.

Illiana Heating & Air Conditioning team in front of company service vehicles in Crown Point, IN.

WE go

Above and Beyond

To serve You

Since 1987, we’ve been helping folks throughout the Lansing and Northwest Indiana area enjoy total indoor air comfort in their homes and businesses. Nationally recognized as both the Residential Contractor of the Year and the Best Contractor to Work For, Illiana cares about its employees as much as its external clients.

Testimonials and Reviews

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“Each winter I make sure I call on Illiana to ensure my system is good to go! This year's visit was a joy, and I can tell the Technician really cared about the work he was doing for me.”
- Alicia C.

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“A couple of years ago, a technician from Illiana advised he discovered cracks in my heat exchanger on a furnace that was just 3 years old. Photos alleged to depict that, and it was suggested to purchase a new furnace. I had just purchased a new furnace for my main, and this other furnace is for an addition, so I was in disbelief that this 3-year old furnace was damaged. Fast forward to a few weeks ago, and I had a technician come out to clean and check my main furnace. Kentrell was that technician, and he performed that service. I inquired about the second furnace to see if he was able to check on it as well since I have a maintenance plan. He advised his work order only showed 1 furnace, but he agreed to check the other furnace out. I hovered because of my concern for this furnace, and he could not find any cracks. His willingness to check, and spend the time investigating was great customer service! He made phone calls to the office to update them about this, and he said the G.M. was going to send another technician out to confirm whether or not there were cracks. Jerry B came out to check it out and confirmed that he could not find the cracks depicted in the original photos. I was then contacted by the office to schedule the maintenance cleaning for this 2nd furnace and was advised that Kentrell would be back to perform that service.

Kentrell is a great young man with a willingness to seek the truth for my benefit, and he deserves to be recognized and given his bonus compensation!”

- Mike B.

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“Spent 15 K on a new HVAC system and have had nothing but problems. Heat has gone out on us 2 times in less than 2 years. And to top it off they charge you for the service call on a brand new system.”

- Nicole Z.

Goldstar membership icon for Illiana Heating & Air Conditioning's HVAC maintenance program.

GOLDSTAR MAINTENANCE PLAN

Get to the front of the line and make maintenance a breeze with a Goldstar membership, only from Illiana Heating & Air Conditioning. With a Goldstar membership contract, not only will you guarantee yourself the great service of our professionals, you’ll also receive the following benefits:

Guaranteed demand service appointments within 24 hours

Included preventive maintenance visits for your covered equipment

Never charged overtime service calls or rates

At least a 15% discount on repairs and consumables

Latest tips and tricks

Cold Climate Heat Pumps Are HVAC Game Changers. Photo of an elderly couple enjoying a hot beverage together in their kitchen.

Cold Climate Heat Pumps Are HVAC Game Changers

January 30, 2026

If you are looking for an HVAC system that heats and cools your Crown Point home, lowers energy bills, and is easy on the environment and your budget, consider an air-source heat pump. 

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close-up of a gas furnace flame.

How Do I Know I Have a Cracked Heat Exchanger?

January 15, 2026

Our experienced furnace repair technicians will inspect and diagnose your furnace issue and resolve the concerns you are having.

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10 Things to Consider When Buying a New Furnace

10 Things to Consider When Buying a New Furnace

December 30, 2025

Winter in Crown Point, is shaping up to be especially harsh this year. Can you imagine not having your furnace to help you make it through? You go to turn it on … and instead of rushing warm air through your ducts, it rattles, groans, and then just sits in sullen silence, clearly protesting another season of overworked servitude.

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Need financing?

Illiana Heating & Air Conditioning has you covered!

We understand how tricky it can be when your HVAC system breaks down. We provide financing options so we can help relieve some of the stress. Subject to credit approval, you may qualify to finance a new system installation or repair service. Go to the website below and complete the application form to find out what you are eligible for.

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LET US HELP YOU EASE THE STRESS OF THOSE COSTS

Adding or replacing a heating and cooling system affects your finances as much as your home comfort. Fortunately, we’ll help you take advantage of monthly promos and specials Illiana Heating & Air Conditioning is offering.

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Join the Illiana Team!

WE SERVICE ALL BRANDS

Illiana Heating & Air Conditioning service vehicle with company truck wrap.