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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

Residential Equipment

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

commercial

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.

hum

Humidifiers

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

thermo

Thermostats

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

Reviews

Purchased a new air conditioner and furnace and was impressed from the initial sales contact, to verifying what we needed, installation and clean up. Everyone we dealt with did a great job and we love our new system.

Kara L.

We apologize for not sending this note earlier, we wanted to thank you so much for the wonderful afternoon.  Not only was Denny a great tour guide, we met many players and were able to get great autographs for our kids! We loved the afternoon and will remember that for...

Scott & Betsy N.

We just wanted to thank you for the excellent customer service your company offers.  We have been clients for close to 20 years, having regularly scheduled service calls.  Well the time finally came again, last night we called about 9 PM…We got a human (shock!) and the service tech on...

Steve and Viki F.

Installation technicians were here on time saw them a few minutes before they knocked at the appointment time.  I really felt bad for them considering the weather today.  But, they are really hard working professionals and weather did not impede them!  They installed both a new furnace and air conditioning...

Paul S.

We have been using Welsch for over 20 years and have been impressed with every aspect of their service and products. Everyone is knowledgeable, friendly and always ready to help. We always highly recommend them to our friends.

PN

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