MENU FIND US ON 45°F REQUEST SERVICE (314) 742-9310 (Main) (314) 742-9338 (Service) Heating & Air Conditioning Heating & Air Conditioning We strive to be the best heating and air conditioning company in the St. Louis/St. Charles area with over 120 years of experience. Residential Equipment We furnish and install a complete line of heating, air conditioning, air cleaning and humidifying equipment LEARN MORE Commercial Equipment The Welsch Heating and Cooling Company offers an enormous array of commercial equipment and services to fit the needs of businesses both large and small. LEARN MORE Air Conditioning & Cooling Efficiency-Your air conditioner can be the most expensive appliance to operate in your home. LEARN MORE Furnaces & Heating Whether you have gas heat, electric heat, boiler or have a heat pump, we have a solution for you. LEARN MORE Air Cleaners Installing a humidifier to your heating system will provide moisture to your home all winter long. LEARN MORE Humidifiers Controlling humidity can not only affect how comfortable you feel, it can actually save you money on your monthly energy bills. LEARN MORE Thermostats Thermostats help your heating and cooling equipment maintain the optimal temperature setting with the utmost energy efficiency. LEARN MORE Reviews Previous We have radiant floor heat, but added a heat pump. We also needed a new AC. Job took 2 days, since it was such a big job. Very professional & friendly gentleman we had come work. Even had a few new vents put in. The AC has never been cooler... BRENDA S. Next MORE REVIEWS Home About Reviews Specials Finance Options FAQs Areas We Serve Contact HEATING & AIR CONDITIONING Residential Equipment Commercial Equipment Air Conditioning & Cooling Furnaces & Heating Air Cleaners Humidifiers Thermostats SERVICE & REPAIR Repair Services Request Service Request Estimate Parts & Accessories ABOUT From Our President Welsch Team Our History Welsch Happenings Accomplishments Organizations Careers FOLLOW SERVICE & EMERGENCIES: (314) 742-9338 CALL TODAY! X Copyright © 2021 Welsch Heating & Cooling Co. All Rights Reserved. | Privacy Policy St Louis Web Design by IQComputing Areas We Serve Contact