Residential

Harster has been serving the St. Louis area for over 60 years. When it comes to residential HVAC work, we’re the company to call. And for emergencies, call our 24-hour hot line for help immediately!

Air Conditioning Heat Pumps
Custom Chimney Covers Humidifiers
Energy-Saving Thermostats Planned Service Agreements
Free Consulting for New Home Owners Residential Maintenance
Free Furnance Heat Exchanger Inspections Wall & Floor Registers
Free Second Opinion Water Heaters
Heating Systems