COmmercial & Residential HVAC Services

40+ Years of Experience in Granite City, Illinois

Call Now

Expert HVAC Contractor

For over 40 years, Koesterer HVAC has been keeping the Granite City, Illinois area comfortable with expert heating and cooling services. Whether it's a repair, maintenance, or installation, we've got you covered. Our team is experienced in working with all makes and models of heating systems, air conditioning systems, and geothermal systems. Trust us to keep your home or business cozy all year round.

Contact Koesterer HVAC for all your heating & cooling needs.

Contact Us Call Today

Heating

Koesterer Heating and Cooling Inc. offers high-quality heating system repairs and maintenance for all brands and models.


Also, we are the region's only full-service sheet metal shop. We fabricate items for HVAC systems.

Learn More

Air Conditioning

When you work with us for your AC system installation or maintenance, you can count on us to deliver unparalleled service.


We provide a 10-year manufacturer's warranty on parts and GUARANTEE our labor.

Learn More

Geothermal

Would you like to equip your building with a geothermal heat pump? Call our professionals!


We have hundreds of happy clients in the area, and we have a solid consumer base made up of recommendations from individuals just like you.

Learn More

Authorized Dealer for American Standard and ClimateMaster Products

Share by: