What Your Neighbors Are Saying
Our reviews show our dedication to 100% customer satisfaction.
"System replaced in one day. Energy bill dropped immediately. The crew was professional and cleaned up everything before they left."
— Jennifer M., O'Fallon
"Called at 8am, tech was at my door by noon. Honest pricing, no upsell pressure. Exactly what you want from a local company."
— David K., St. Peters
"Used Swiss Air for 10 years. The new Trane system is incredibly quiet. Wish I had replaced it sooner."
— Lisa R., Chesterfield
"Financing made it possible. No pressure, fair terms, and the install was flawless. Highly recommend."
— Mark T., Wentzville
Join 10,000+ Happy St. Louis Customers
Why Swiss Air?
35 years of doing things the right way
35+
Years
10,000+
Installs
4.9
Stars
#1
in O'Fallon
Serving You Since 1989
A family business that lives and works in St. Louis.
Same-Day Service Available
When your system goes down, you don't have time to wait. We move fast.
Veteran, Military & Senior Discounts
We honor veterans, active military, first responders, and seniors. Ask about your discount when you call.
100% Satisfaction Guarantee
If you're not completely satisfied, we make it right!
Why Trane?
Serving Greater St. Louis
From O'Fallon to Chesterfield and everywhere in between
Don't see your city? Give us a call — we likely serve your area!
Get Your Free In-Home Estimate
Locks in your $2,500 savings. No commitment.