One Hour Heating & Air Conditioning® of St. Louis

By far one of my favorite HVAC companies I have worked with Nationwide! Thank you for being amazing!! Nicole P. from URS

These folks are top notch. Called and had someone on site within 2 hours and repair knocked out super fast. They were courteous and knowledgeable and had me up and running before I knew it. Will go to them for all heating and cooling needs from here on out

Farrell provided excellent service and was very informative as I observed what he was doing. The repair was very simple so he did not charge me more than the fee to come out. I signed up for their annual maintenance package because I was pleased with my service. My heat was out and they were able to send someone the same day to check it out!

JT Dunn and company did everything they said they would do. From my initial meeting with Erik, to Rob and Logan, the installers, the process was outstanding. They live up to what they say they will do. Thank you.

In simple terms they are the best, I used them in very different occasion and they always do the best. I refer them to few of my friends and they are all happy with their services. Brett always ready to help and I have been dealing with him for the last 8 years or so.

Our furnace quit working and our technician, Robert, was there within the hour. He was quick, professional and we were really happy with the results. We will definitely use them again in the future.

I had them out for a bid on an hvac unit and they were upfront about the work that would need to be done and in the end i did not end up selecting them but I appreciated the honesty.

So grateful Dunn Heating and Cooling was able to send a service tech same day as we have -3 degree temps and my heater was not keeping up. Our tech, Ferrell, was prompt, professional, courteous, and knowledgeable. Highly recommend and will use their services again!

They came to our house, got to work and did the job. Always professional and follow through to completion in a timely manner.

Replaced capacitor quickly to get my old AC going and was very knowledgeable, professional and easy to deal with on proposing a new system which is to be installed shortly.