Full-Service Heating & Cooling Specialists in O’Fallon, Illinois!

We service O'Fallon, Illinois and surrounding areas.

If you find that your residential or commercial space is struggling for proper air flow, or is failing to stay warm or cool, call our team of experts in O’Fallon, Illinois! We have been serving O’Fallon, Illinois, and surrounding areas for over 93 years and look forward too many more! At Kiefer Heating & Cooling, we offer a variety of HVAC services to those in O’Fallon, and surrounding areas. If you have any questions about your home or commercial HVAC system, please call us and we will be happy to get it running right in no time!

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Local A/C Specialists in O’Fallon, Illinois

At Kiefer Heating & Cooling, our team of experts have the knowledge and experience to repair and install all types of heating & cooling systems to your commercial or residential space. Our most popular services are:

If you have any questions about the services that we provide, please give us a call or fill out our contact form, and one of our O’Fallon, Illinois representatives will be happy to assist you and get you started on a free estimate!

Geothermal Heating & Cooling in O’Fallon, Illinois

Geothermal heating & cooling is the best home solution for those wanting to increase efficiency and cut costs. It is also the most eco-friendly option. These systems use the power of the earth to keep your home or office at a constant temperature throughout all seasons. The systems that we provide and install include the following:

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Your Trusted Heating & Cooling Professionals In O’Fallon, Illinois!

We proudly offer heating and cooling services to residents and business owners in O’Fallon, Illinois, and surrounding areas. We are open Monday – Friday, 8 am – 5 pm, and offer 24/7 emergency service. Call our staff to solve your heating and cooling problems, today!