Expert HVAC Services in Granite City IL | Koesterer Heating & Cooling

Professional HVAC Installation, Repair & Maintenance

For over 40 years, Koesterer Heating & Cooling has been providing expert HVAC services in Granite City IL and Madison County IL.

Our certified HVAC technicians specialize in heating, cooling, and ventilation systems for residential and commercial properties.

From furnace repair to AC installation, we deliver energy-efficient HVAC solutions built to last. Trust our family-owned HVAC company serving Metro East Illinois for honest pricing and reliable comfort year-round.

Contact Koesterer HVAC for all your heating & cooling needs.

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.

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.

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.