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About Merts

Since 1952, Merts Heating & Air Conditioning has provided quality HVAC service to its residential and commercial customers in the Chicago area and nearby areas in Indiana. Our reputation as Chicagoland’s HVAC leader has been built on providing the best heating and cooling equipment and sales and service. But don’t take our word for it.

Merts has been recognized by the Better Business Bureau for excellence, and our Select Contractor providers have been awarded with NATE and BPI certifications. We take pride in offering our customers the best products and services available and promise to earn your trust. To that end, we pledge the following:

Call Merts today at (833) 52MERTS (833-526-3787) and let us take care of all of your heating and cooling needs. We look forward to working for you!

Kleine Heating & Air Conditioning Under New Ownership


After serving the great people of Crown Point, IN for decades, Kleine Heating & Air Conditioning has been acquired by Merts Heating & Air Conditioning. 

Even though there can be a fierce rivalry between the Hoosiers and the Illini, our only goal is to provide top quality HVAC sales and service to our clients.


The realization of a long-time goal

When Ken and Mary Kleine decided to retire, they chose Merts to take care of their loyal clients going forward. Merts has a long history (1952) of providing superlative customer service. Originally based in Steger, IL Merts has looked for a long time to expand operations in Northwest Indiana. In some ways it felt inevitable because one of the company’s owners lives in Indiana, along with several Merts employees.


The Merts Pledge

Now, former Kleine customers in Indiana will receive the same great service Merts has provided for decades. It doesn’t matter if you are a fan of “Da Bears and Da Bulls” or of the Colts and the Pacers, whenever you need HVAC repair, replacement, or maintenance needs (including 24-hour emergency service), residents of both states can count on the professionals at Merts Heating & Air Conditioning.

Illinois Location:

3102 Louis Sherman Dr
Steger, IL 60475

Indiana Location:

528 Sheridan Street
Crown Point, IN 46307