O'Fallon Change Location

One Hour Heating & Air Conditioning® of O'Fallon

Nicole Knickmeyer

They went the extra mile to be helpful

"I have been very impressed with the standard/routine maintenance services as well as the duct cleaning, The technicians were courteous, knowledgeable, thorough, and conscientious. They explained the process clearly to ensure there were no surprises. They went the extra mile to be helpful and to answer my questions."



"I want to thank One Hour for resolving my A/C unit problem. Everyone that came out was amazing. My husband and I are so impressed with their commitment to make sure that we were happy and pleased with their work. Thanks One Hour!"

Fast and reliable

"In one week, I had my quote, financing approved, and then my heat pump installed! Only three hours to remove my old unit and get the new unit in. Really great service!"

Honest Company

"I would like to give a big shout out to One Hour Heating & Air Conditioning for the OUTSTANDING work they performed replacing my air conditioner and furnace. Their workers were on time, courteous, and informative! I had contacted many companies for estimates and One Hour Heating and Air Conditioning was by far the best price! They offered different options to choose from and all were reasonably priced and MUCH lower then all rest! I have dealt with other contractors who try to rip off the homeowner only to line their pockets. So I am happy to have found an HONEST Company! So if you are looking for an honest, trustworthy, courteous company that stands behind their quotes and work then One Hour Heating & Air Conditioning is it!"

I would recommend these folks to anyone.

"Two years ago we called because it was the dead of summer and our AC went out. They came out the next day and had us up and running (replaced motor). This year we started having issues again (our system was about 15 years old). We were going to see about a new system anyway. Was given a quote on Monday and they had a new system in on Wednesday. The men were professional, cleaned up and removed old system. We are extremely pleased with the system and service. I would recommend these folks to anyone."