Request Service Financing Available "Subject to Credit Approval. See Dealer for Details." (618) 451-7500 Serving Granite City, Collinsville, Edwardsville, Glen Carbon, Troy, Maryville, and the Surrounding Areas Home Our HVAC Services About Request Service Contact Serving Metro East St. Louis Since 1992 Expert Residential and Commercial HVAC Services 10-Year Manufacturers' Warranties on Parts | 40+ Years' Experience | Competitive Pricing Authorized Dealer for American Standard and ClimateMaster Products Heating Contractor Koesterer Heating And Cooling Inc provides quality repairs and maintenance for all makes and models of heating systems. We're also the only full-service sheet metal shop in the area. We do fabrication for HVAC products. For more details, call us today. Learn More Air Conditioning Contractor Rely on us to provide you with unmatched service when you hire us for your AC system installation or repairs. We GUARANTEE our work and offer 10-year manufacturers' WARRANTIES on parts. Call us today to schedule your appointment! Learn More Geothermal Contractor Do you want to install a geothermal heat pump in your building? Contact our experts! With hundreds of satisfied customers throughout the area, we have a strong customer base of referrals from people just like you. Learn More Watch Our Video .cls-1{fill:#fff;opacity:0.9;}.cls-2{fill:#35434c;} play-icon2 Message Us Today Please fill out this short form and we'll contact you shortly. Name: Email: Phone: Message: VISIT US Granite City , IL 62040 HOURS CONTACT US (618) 451-7500 info@koestererhvac.com Privacy Policy | Cookie Policy | Conditions of Use | Notice and Take Down Policy | Website Accessibility Policy © 2021 The content on this website is owned by us and our licensors. Do not copy any content (including images) without our consent.