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Heating & Air Conditioning

Residential Equipment

We furnish and install a complete line of heating, air conditioning, air cleaning and humidifying equipment from the following manufacturers:

Manufacturers

Each Manufacturer provides us with all available efficiencies of both furnaces and air conditioning units. For detailed information please contact us at 314-872-8070 and speak with one of our Sales Engineers.

For more information about all of our products, including air conditioning, furnaces, humidifiers, thermostats, and air filtration systems, please see our FAQ page.

Reviews

I have always received good service from Welsch. Today Brian C. came for my annual furnace service. He was very professional, yet friendly. He happened to arrive at a moment of crisis, as the float broke off of my sump pump just a few minutes before. He was extra patient,...

Helen P.

I cannot remember the cost, but we got a new furnace and AC unit. They also installed a new thermostat that does wifi. I was pleased with their prompt, neat service.

Barbara U.

I just wanted to drop a note of sincere “thanks” for the wonderful service we received today. When my kids called me this afternoon to tell me that the A/C was blowing warm air and that it was 84 degrees in the house, I immediately called Welsch’s emergency service line...

Jane C.

bought the Annual Maintenance Agreement $178.95 for 2 visits per year. The A/C and heating system was checked and filters were changed as needed.

Nicole M.

The furnace went out during a cold snap in March. Welsch was here with different options available from repair to a new unit. We opted for a new air conditioner and heater as the old one was close to 15 years old. They were competitive with other dealers so we...

Jean P.

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Service & Emergencies: (314) 567-6347 Call Today!

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