Harster services ALL heating/cooling systems. With over 50 years in the business, we’ll help determine the best system for you and only install what’s required (that means no upsell for stuff you don’t need).


We’ll provide free consultation and, of course, we’ll back our installation with our own one-year service warranty – above the manufacturer’s warranty.


Harster is also on call 24/7/365 for emergencies.


Click here for a PDF of our complete list of services and manufacturers.

Don't have Reader?

9900 Gravois  St. Louis, MO  63123  314.631.5300