St. Charles Heating & Cooling

When your air conditioner or furnace stop working like they should, you need an experienced HVAC company to help. Design Aire is a premier heating and A/C company that can help with whatever needs you have! Learn about the various ways we can assist and heat or cool your house to the perfect temperature!

    Contact the HVAC Experts of St. Charles: 314-739-1600

Contact the HVAC Experts of St. Charles:


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​HVAC Services St. Charles

We provide a wide variety of HVAC services throughout the St. Charles area. No matter if you notice a small issue with your system or it has stopped working altogether, we provide the equipment and know-how to get the job done.

Our HVAC technicians are skilled at providing help for all makes and models of A/C units and furnaces. It doesn’t matter what time of year or type of weather you are experiencing; we can help make your home comfortable again through our various HVAC services.

St. Charles Air Conditioning Repair

Your A/C unit usually operates in the background, barely noticeable to your day to day life. However, if it suddenly stops working, has an unusual smell, starts making weird sounds, or has some other kind of problem, having an experienced team of trusted technicians can provide you peace of mind. We provide high-quality service at every service check and work towards honoring values like integrity and hard work that our founders leaned on in their service.

AC Repair Services

St. Charles Furnace Repair

Many common furnace problems come up when you least expect them, such as just as the cold weather sets in. If you recently started up your heater, only for something to go wrong, you can trust our technicians to use their training to diagnose and repair furnace problems.

Furnace Repair Services

St. Charles Air Conditioning Installation

Did you know we are the #1 Trane dealer in the Midwest? It’s true! Trane is a trusted HVAC manufacturer, and they have trusted us for over 10 years to provide high-quality service and installation of their HVAC systems. If your air conditioner needs a full install land replacement, we can help!

AC Installation Services

St. Charles Heating Installation

Over time, older furnaces frequently become less efficient, leaving you out in the cold. If your heater recently quit altogether and repairs don’t seem to be doing the trick, it’s time to replace the whole unit. Our experienced technicians provide trusted service and can get your home back to a comfortable temperature once again with a new furnace.

Heating Installation Services

Contact us for all of your HVAC service needs!

Our most valuable asset is our team, for it is their pride and dedication to get the job done efficiently. As a small, family-owned business, we are able to give you the personal attention you deserve.

Since 1904, thousands of people in St. Charles have recognized Design Aire for our quality furnace repairs and HVAC products. Don’t believe us? Take a look at our our many awards, including an accolade for being the #1 Trane dealer in the Midwest for over 10 years.

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Financing is provided with approved credit by Wells Fargo Bank, N.A., an Equal Housing Lender.
Design Aire offers special financing with approved credit with this secure application:

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Customer Testimonials

Seth was our salesperson. He listened to our needs and provided the right product at the right price. The installation team arrived on time and went right to work.They worked with confidence and professionalism.We appreciated the care in protecting our floors and even the choice of how they went up on the roof indicated that they really did care. This company did what they said they would and certainly has our vote of appreciation and gratitude. We will happily recommend Design Aire to anyone.

Ken L.

One of the best companies to work with. My own profession is in a service industry and so I very much appreciate all the positive things about Design Aire.
The install crew arrived right on time and took exactly how much time they said they would to complete the job. The work was done well, the crew cleaned up after themselves, and were very pleasant. Seth in the office was extremely in-tune to our needs and very responsive.
I would highly recommend Design Aire.

Heather H.

Our new HVAC system was installed yesterday and we could not be happier. From quote to completion the process was great! 100% would recommend!

Greg H.

We have used Design Aire for both a new furnace two years ago and a new AC unit this summer. Everything was done very professionally and quickly. I would not hesitate to recommend them to anyone needing any type of HVAC work done.

Sean K.

Design Aire was the best choice from start to finish. Design Aire gave me the best price with the most detailed quote. The service technicians were very friendly and completed the job ahead of time. I highly recommend Design Aire.

John K.

We've used them for our old house and our new house. They are honest, friendly, professional and affordable. We felt lucky to find them.

Maddy R.

I was very impressed with Design Aire. They were timely and did an outstanding job with the installation of my new furnace. They had great communication and went above and beyond. I would highly recommend them to friends and family. Thank you so much Seth and Design Aire for making this an effortless transaction. VERY PLEASED!

Jonny M.

Design Aire sent a salesman to plan the system, and just a couple of days later sent the installers to remove the old system and install the new one. Everything happened when they said it would and the system performs as they said it would. All of the Design Aire staff were courteous, the work was performed efficiently and neatly, and they left the area cleaner than they found it. This is the second unit Design Aire has installed for us, and I have no need to look elsewhere.

Dan L.

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