We have over 35 years experience serving Cook, McHenry, and Kane Counties heating and cooling needs. For any and all repair and installation issues for your furnace, air conditioner, boiler, humidifier, thermostat, drier vents and more call us today!! 


See why our customers in Cary, Crystal Lake, Lake in the Hills, Algonquin, Barrington, Arlington Heights, Palatine, Huntley, Lake Zurich, McHenry, Woodstock, Fox River Grove, Lakewood, Gilberts, Elgin, St. Charles, Geneva, and all of Chicagoland IL have made us #1!

Extreme Heating & Air Conditioning uses high quality products such as Aprilaire and American Standard.

Visit the Aprilaire Website Visit the Aprilaire website to learn about quality indoor air products.

Find the perfect heating and cooling system for your home!

Extreme Heating and Air Conditioning employs N.A.T.E. Certified technicians. See why it's important to work with an HVAC contractor who is N.A.T.E. Certified.

See how upgrading or replacing your HVAC system can save you money at tax time!!! Click on this link to find out how: Energy Star Tax Credits