Schraer Heating & Air Conditioning is a family-focused HVAC service provider serving Warrenton, O’Fallon, and nearby communities in Missouri’s St. Louis Westplex. Established in 1946, the company offers residential and commercial heating, cooling, and indoor air quality services, with 24/7 emergency assistance available.

For homes, Schraer repairs, maintains, and installs air conditioning and heating systems, including central air conditioners, furnaces, boilers, heat pumps, geothermal equipment, and ductless systems. Services also include Wi-Fi and smart thermostats, zone controls, and seasonal tune-ups. Its indoor air quality solutions include air purifiers, humidifiers, dehumidifiers, ventilation, and related system improvements. Duct services cover fabrication, cleaning, sealing, inspections, and repairs to support airflow and efficiency.

For businesses across St. Charles, Warren, and Franklin Counties, Schraer provides commercial HVAC design, installation, maintenance, and emergency repairs for heating, cooling, and indoor air quality systems. The company also offers maintenance plans through Jake’s VIP Club, financing, estimates, and scheduled service. Customer feedback highlights prompt appointments, clear explanations, careful installation, and tidy cleanup.