Harster Heating & Air Conditioning

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    Stuff happens, as the phrase goes. Residential or commercial, we've seen it all in 65 years. Whether you've got a 911 or just need some 411, we can help.

    We carry top manufacturers and handle installation and repair with heat pumps, rooftop units, water heaters, thermostats, registers, boilers, humidifiers, heat exchangers, inspections, sheet metal work (whew) and much, much more. The full list is below. If you're a DIY-er, we can help you with media filters, too.


    With over 65 years in the HVAC biz, Harster has kept things comfortable in St. Louis. For home or business, heating and cooling repair, installation or maintenance, call Harster for a free estimate.  


    Harster has over 65 years of experience providing exceptional residential service for a variety of needs, including: complete HVAC systems, furnaces, hot water heaters, air conditioners, heat pumps, thermostats, registers, gas and electric heaters, humidifiers, heat exchangers, chimney covers, and – whew – pretty much anything else you can think of in the HVAC world.  


    We've worked with contractors large and small, and have enough experience to take on even the most complicated, intricate jobs. If you're in the bid process, give us a call. Better still, call our references. We'd love to help out.  

    Schedule Service

    If it's an emergency, we'll be happy to help 24/7. If it's not too urgent, feel free to give us a call and schedule an appointment. One of our friendly Harster folks will be happy to set you up and work around your schedule.  

    Energy Management

    It's more than just conserving and reducing energy usage. We're experts in helping you keep costs from rising through the roof — literally. Give us a call and let us take a look at how your house or business can be more efficient.  

    For home or business, heating and cooling repair, installation or maintenance.

    Call Harster for a free estimate.


    Send us an email!

      Contact Us

      9900 Gravois Road

      St. Louis, MO 63123

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