Total Comfort.
From the leading
HVAC professionals.
View Reviews View Rebates
+ Affordable
+ Efficient
+ Quiet
= Ductless.

Learn More

Our Services and Specialties

Get your A/C or Furnace Repaired by the Pros!

Weis Comfort Systems is proud to provide St Louis and the surrounding areas with the highest standard of air conditioning repair, furnace replacement, and health and safety services and maintenance. Our team boasts over 40 years of experience in the HVAC repair and installation industry, and we look forward to providing you with the absolute best heating and cooling repair or replacement experience possible. For more information about our heating and cooling services, or to request a quote, contact us today!

Request A Quote Today!

HVAC Installation and Repair in St. Louis

We're hiring! Click here to learn more.

Since 1974, Weis Comfort Systems has been providing the Greater St Louis area with superior HVAC repair and installation services. Our tradition is to provide quality service combined with unsurpassed craftsmanship and time tested business values to every one of our customers. Backed by decades of experience in the HVAC industry, St Louis residents can trust that the Weis Comfort Systems team has the knowledge and skillset to accurately complete their AC, furnace, and ventilation repairs and installations.

Brands +
Products Learn More

In our effort to prove our commitment to client satisfaction, Weis Comfort Systems implements only the industry's best products manufactured by leading brands such as Daikin, Amana, Goodman, Lennox, Honeywell, Mitsubishi, and more.

Learn More

Health +
Safety Learn More

Weis understands the importance of health and safety; that's why we offer carbon monoxide, air purification, and filtration, along with a variety of other products and services to ensure comfort and health in your home or commercial property.

Learn More

Services +
Maintenance Learn More

The Weis family has served the St Louis area with heating and cooling services since 1927. If you're in need of furnace repair, AC replacement, filtration maintenance, or anything in between, allow us to show you what makes us different.

Learn More

Boiler Repair & Installation

Harry L. Gaines founded the Gaines Heating Company specializing in the installation and repair of coal-fired central steam, hot water, and gravity air heating systems. Gaines HVAC is recognized as a specialist in complete design, installation, replacement, and service of all types of heating and cooling systems including boilers. Weis Comfort Systems is proud to carry on that tradition through our acquisition of Gaines HVAC into the Weis Comfort Systems family of HVAC companies.

Installation Repair

Our Services and Specialties

Get your A/C or Furnace Repaired by the Pros!

$25 Off

Emergency Service

Good for emergency service only. Not valid with any other service or offers. Cannot be combined with PTU. Call for details.

Expires 12/31/2019 | *Terms & Conditions

$50 Off

Aprilaire Whole House Humidifier

With PTU or Planned Maintenance Service. Call for details.

Expires 12/31/2019 | *Terms & Conditions

Serving St. Louis Since 1974

Weis Comfort Systems

Excellent Service

We have been customers of Weis for over 40 years. We have never even considered calling a competitor because we have never had too. We have always received excellent service and the technician's are outstanding....

M. M.
Fixed Right The First Time

Could not ask for better service!! Frank was prompt, knowledgeable and very courteous! Weis Comfort Systems was quick to respond and the price was affordable. The Knowledge of their staff is always spot on, quick but fixed right the first time. Thanks Weis and Frank!!...

Jeannie B.
Excellent Customer Service

As a long-time Weis customer, I consider it an exceptional company. They are competent, dependable, efficient and courteous. Weis has installed and serviced our heating and cooling equipment for nearly 20 years. When our thermostat went out on the coldest night of the year, Rich got us warmed up again in short order. Rich is a great example of excellent customer service and a big reason for my confidence in the company....

Richard C.
Clean, Neat, Pleasant

Service person arrived during appointment time frame, phoned ahead, worked in a timely manner, was clean, neat, pleasant, and wore protective boots inside the house (raining outside.)...

C. G.