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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 HVAC Equipment

Residential Equipment

We furnish and install a complete line of heating, air conditioning, air cleaning and humidifying equipment

rooftop-unit

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.

air-conditioning

Air Conditioning & Cooling

Efficiency-Your air conditioner can be the most expensive appliance to operate in your home.

furnance

Furnaces & Heating

Whether you have gas heat, electric heat, boiler or have a heat pump, we have a solution for you.

air-cleaner

Air Cleaners

Installing a humidifier to your heating system will provide moisture to your home all winter long.

Humidifiers

Humidifiers

Controlling humidity can not only affect how comfortable you feel, it can actually save you money on your monthly energy bills.

Thermostats

Thermostats

Thermostats help your heating and cooling equipment maintain the optimal temperature setting with the utmost energy efficiency.

Reviews

Removed old equipment and installed new heating & air-conditioning system in our home. All work was completed in one day as promised, and performed in a very professional manner.

Horace P.

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.

Just wanted to let you know how grateful I am for the wonderful service I have received over the years from your company. ALWAYS super fast response time for repair work, from office staff calling for appointment, to calls the repairman is on the way, to the professional/courteous repairman that...

Matthew K.

Steve W. arrived on time. He cleaned out the air filters and showed me how dirty they were. He checked the outdoor AC units and cleaned them out. Said there was a lot of pine needles in them. One of the AC units was slightly low on freon and he...

Kyle P.

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.

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

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