Harster Heating & Air Conditioning

Contact Us


    We serve St. Louis and the surrounding area.

    We take care of heating
    and air conditioning
    in your home since 1950

    Thanks for stopping by

    You’ll find everything you need right here on our site. Our team is dedicated to all things HVAC, working with the top manufacturers the business has to offer. Our commitment to your family and business’ comfort and safety is the reason that we’ve been in the business for over 65 years, and we don’t plan on stopping any time soon.

    If you have questions or suggestions about how we can make your experience with us even better, please don’t hesitate to reach out to us on the contact page. Please check back often, as we update our specials and promotions on a regular basis. Thanks for visiting.


    Dave Harster, President


    Our Services

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

    Call Harster for a free estimate.

    Harster is now a part of the Classic Aire Care Team. Classic Aire Care shares Harster’s long-held values of professionalism and doing the right thing. As a result, your technician may arrive in a different vehicle than expected, but you will receive the same great service you have come to expect.

    Not sure how to choose an HVAC contractor?

    To stay informed on our business developments, sign up for our newsletter below and you’ll receive our handy guide. This will help you stay informed about how to make the right decision on how to choose the best contractor.

    Read More

    We offer financing!

    Take the stress out of caring for your family or business by taking advantage of our financing options. Contact us today to learn more!

    Read More

    Still not sure about Harster?

    Our team is on standby and ready to answer your questions, provide advice and give suggestions. Please contact us by phone or email at your convenience.



    Client Testimonials

    I could write a book, but to try and keep it short, this company has been amazing!! We called when it was HOT! HOT! HOT! and our ac wasn’t working right. We knew it needed to be replaced. They came out the same day, gave us the bid and we scheduled for the next day installation. I’m a worrier and have called a couple times thinking something wasn’t right with the unit. They sent someone out within a couple hours to take a look. Everyone we’ve encountered has been professional. I recommend this company.
    - Kaci G. St Louis, MO
    Harster is a great company to work with. They replaced our furnace and fixed our AC over the past 12 months. Each time they have provided the most value compared to other HVAC bids we received. Very easy to get a hold off, return calls promptly, walk through everything very clearly and are friendly to deal with. I highly recommend them for any HVAC needs.
    - Jonathan F. St Louis, MO
    This week, our AC was blowing neutral air without cooling the house. We called the next morning at 8 am and they were out that day by 10:30 am to check it out. As soon as he arrived, the tech knew immediatly what the problem was once we described the symptoms. He went outside and quickly replaced a burnt out wire on our ac compressor. We initially thought we were going to have to get a new AC since it is nearing the end of its life cycle, so getting the diagnosis and fix for much cheaper than we originally thought was so relieving. When it’s time to get a new AC finally (probably next year) we will definitely be giving Harster a call! Thank you for making my week!
    - Shannon S St Louis, MO


    Our Blog

    January 30th, 2020 The History of Harster Heating & Air Conditioning

    We’ve got a long history in south St. Louis. Our company was started by my dad, Emil F. Harster, in 1950. It was a one-man, one-truck company and it’s grown to 28 employees and 24 trucks today – [...]

    Read More
    January 30th, 2020 Why Harster?

    Sure, we could tell you how great we are, but our customers do a way better job. And if you’re one of those very happy people and haven’t piped up, let us know about your experience here. Also, i [...]

    Read More


    Send us an email!

      Contact Us

      9900 Gravois Road

      St. Louis, MO 63123

      Sign Up For Our Newsletter!

      Get exclusive offers and energy saving tips.

      We respect your privacy. Your email address will NOT be shared or sold.