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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“Great service. Helpful office staff. Tech was very friendly did good job and left work area clean. Always good experience working with them. Have recommended to others.”

Dan Hayes

- Dan H.

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“Excellent service and very polite and friendly. I also appreciate the effort by ILLIANA Heating and Air Conditioning Management to ensure my safety by sending a photo and name of the service technician BEFORE he arrives at my home so I can ensure I am safely letting in the correct person to resolve my heating and/or cooling issue. I highly recommend ILLIANA Heating and Air Conditioning!”

Rich Flahaven

- Rich Flahaven

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

How Can I Afford a New AC System (and Other HVAC Equipment)?

March 15, 2024

The COVID-19 pandemic has affected so many lives around us, both health-wise and financially. At Illiana Heating & Air Conditioning, we remain committed to providing the best service to all our Indiana customers during this difficult time. Let’s stick together as a community and help each other whenever we can. We can certainly understand how…

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Why Air Duct Cleaning Is Important. Professional Air Duct Cleaning.

Why Air Duct Cleaning Is Important

February 15, 2024

Just like your lungs are an important connection to the rest of your respiratory system, your home’s ductwork, or air ducts, are importantly connected to your heating, ventilation, and air conditioning (HVAC) system. For your HVAC system—and your lungs—to perform at peak level, the numerous airways need to be open and clear. All in the name of breathing properly.

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Maintenance man working on a heat pump outside.

4 Factors to Consider When Buying a Heat Pump

January 16, 2024

So you are looking to invest in a heat pump. You are not alone — many Americans are making the switch.  Why? For starters, heat pumps are generally more efficient than a traditional heating, ventilation, and air conditioning (HVAC) system. What is more, they offer both heating and cooling, so they are versatile.  At ,…

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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 partner with Wells Fargo, Ally, and Fortiva to provide financing options so we can help relieve some of the stress. 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.

Coupon for  OFF REPAIR. Only valid toward repairs. Restrictions may apply. Call for more details. 219-627-1589

Join the Illiana Team!

WE SERVICE ALL BRANDS

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