For all of your
home HVAC Needs

Residential Heating and Cooling

For 20+ years, Karolyi’s has provided heating, air conditioning, and air quality services to Metro-Detroit homeowners. Karolyi’s is an authorized Comfortmaker dealer, and sells and services all major brands.

Residential Heating

Residential Heating

Karoly's Residential Cooling

Residential Cooling

Commercial Services

Karolyi’s Heating, Cooling and Refrigeration offers expert installation and servicing of commercial heating, ventilation, and air conditioning systems. We work with all major brands and are available 24-7 in case of emergency. Plus we service commercial cooking equipment and refrigeration, specialize in a full range of electrical repair services, and provide HVAC solutions for licensed marijuana grow rooms.

Karoly's Commercial HVAC

Commercial HVAC

Karolys' Commercial Refrigeration

Commercial Refrigeration

Karoly's Commercial Services

Other Commercial Services

About Us

Steve Karolyi founded Karolyi’s Heating, Cooling and Refrigeration in 1998. Steve is a licensed, certified mechanical contractor, master electrician, and boiler installer. His company is a one-stop shop for almost any residential or commercial need.

On the residential side, the staff at Karolyi’s Heating, Cooling and Refrigeration specialize in the installation, maintenance, and repair of residential heating units, air conditioning systems, and hot water heaters. We work with the top brands and bring over 20 years of experience taking care of residential customers throughout the Metro Detroit area. Our service technicians are also specially trained to service your indoor air quality needs. We can install, maintain and repair indoor air quality (IAQ) services including UV lights and whole-house filtration. We sell and service all brands and are a Comfortmaker authorized dealer, which includes Comfortmaker’s 10-year warranty on parts and Karolyi’s Inc.’s limited labor warranty.

Featured Testimonials

Joseph Herrera

January, 2021

“Steve promptly assisted me this past summer when my central air unit quit during a heat spell and while I was studying for a certification. He was able to send a technician (Dane) out the same day the issue occurred and had a new AC unit installed within a few days. I also experienced an issue with my water heater recently and once again, Steve was able to send Dane out to fix the problem the same day I called. The work performed was reasonably priced and was of sound quality.”


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Mike Petrou

January, 2021

“I own and operate a Dairy Queen. One of my coolers went down. After contacting the after-hours line, Matt and another technician arrived. They diagnosed the problem, gave me options and ultimately fixed my cooler and I’m back up and running. You can’t ask for more professional, prompt and all-around great service. I’ve used Karolyi’s for the past 6 years and have never been let down.”


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Sarah Wilhelm

February, 2021

“Our furnace went out late on a Saturday night. We called Sunday morning and had two technicians out right after breakfast. Thankfully, it was a quick fix, but they stayed on site for a while to make sure the furnace ran (and stayed running!). Thank you so much!”


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Featured Testimonials

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