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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

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.

Enclosed is payment for my new A/C and furnace. Your workmen were exceptional. Ilene O.

Ilene O.

We called Welsch to provide a second opinion after another service provider recommended a new furnace. The technician was not only professional, prompt and courteous, he was unbelievably thorough! He insisted on combing through every aspect of our furnace to diagnose a problem, and found one in the most unlikely...

Lynn P.

Excellent They were very professional. Left the jobsite very clean. Explained the equipment quite well. Walked me through the several rebates. Overall, I cannot think of one bad thing about my experience.

Gore

Just sending a note of thanks for a job well done with the furnace and air conditioner replacement at my home.  I appreciate your efforts on the sales side of this project.  I also want to thank the men for the professional installation.  They were prompt, friendly, informed and answered all of...

Tom P.

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