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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

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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.

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air-conditioning

Air Conditioning & Cooling

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

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furnance

Furnaces & Heating

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

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air-cleaner

Air Cleaners

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

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Humidifiers

Humidifiers

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

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Thermostats

Thermostats

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

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Reviews

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 would like to compliment you on the quality of work and courtesy of the technicians who did the installation.  These employees are certainly an asset to your firm.

Dan J.

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.

Just want you to know how very happy we are with the excellent job Mike did on all of our copper gutters/flashing and dormers.

John and Mary P.

I had other bids for an A/C and furnace, and Welsh was not the lowest bid, but it was the professionalism and knowledge of Rick (estimator), and the Lennox product that caused me to choose Welsh (for the 2nd time) to install the new system. I was just as impressed...

MW

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