At Weis, your health and safety is our top priority. This has always been true for our business, but specially during these concerning times. As an essential business, we are being vigilant with a number of safety measures and closely following CDC guidelines to prevent the spread of COVID-19.
Your Comfort is Our Priority "When You Live and Sleep Comfortably, So Do We"

Why Choose Weis?

We'll Keep It Simple!
  • Free In-Person Estimates Image Free In-Person Estimates

    Don't be surprised by "hidden" costs, schedule your FREE in-person estimate to get an honest quote and upfront pricing for your project.

  • Same-Day & 24/7 Services Image Same-Day & 24/7 Services

    Broken heater in the middle of the night? Don't get left out in the cold, we'll be there whenever you need us!

  • 2-Hour Service Window Image 2-Hour Service Window

    Say goodbye to waiting around for hours for your tech to arrive! We will give you a 2-hour window and a courtesy call 30 minutes before arrival.

  • Approved Installers for Sam's Club Image Approved Installers for Sam's Club

    We are the trusted install partner of Sams Club.


Call (636) 202-0073 or Use Our Form
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See Why Our customers love us

5-Star Reviews All Around
  • “When a 21-year-old system was ready to be replaced, they gave me a very clear estimate that included everything I needed, complete with rebates and a loyalty discount based on a percentage of my maintenance costs in the past.”

    - Lori S.
  • “Frank M. performed my 6 Month semiannual Maintenance service today on my Geothermal HVAC. He does an excellent job.”

    - Ed B.
  • “They arrive on time. Jim will take his time and explain everything to me! Having him come out every 6 months to service my heating and cooling system gives me peace of mind all year that my system will be safe and running smoothly!”

    - Lucey L.

Your St. Louis Heating & Cooling Experts

Weis Comfort Systems is proud to offer repair, installation, and other services relating to HVAC in St. Louis, Ballwin and across Southern Illinois. It’s important for home and business-owners to prepare for seasonal changes, but at Weis, we prepare for you.

With our excellent HVAC maintenance plans, you’ll be prepared year-round, no matter what the weather is like outside. Our goal is to keep you comfortable regardless of your budget, which is why we also offer various HVAC coupons and special offers to make our work even more affordable.

And with free in-person estimates available for everyone who contacts us, there’s never a bad reason to call Weis Comfort Systems. Give us a call for fast & effective HVAC service in St. Louis today, and find out why customers love us for yourself.

When you hire Weis Comfort Systems, you get:

  • Convenient service appointments (that means two-hour timeframes for all service calls!)
  • 24/7 and same-day service for emergencies
  • A live person answering the phones—each and every time

Request quick & effective repair, installation, or other service relating to HVAC in St. Louis by contacting us online or calling (636) 202-0073 today!