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A-1 Certified Service has been a family owned and operated HVAC Company since 1973. We have been serving the Knoxville and surrounding areas for over 20-years.  We originated in the central FL area, where we began by installing thousands of air conditioners and heating units.

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In 1992, we moved and settled in northwest Knoxville, TN in the Karns area. Ever since our move, we have made it our goal to provide the highest level of customer service to the area.

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Right now, A-1 proudly has 3 generations of family members involved in the family business. Our company has gone from 1 truck to 8 over the last 20 years.

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We are proud to offer old-school values using new school technology. Regardless of what service you need, we will always give you A-1 quality.

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A-1 Certified Service, Inc. Earns Esteemed 2014 Angie’s List Super Service Award!

Having the power company [TVA] finance the replacement of our system was a big help. Read More - Bryan B.

They are really good. They are really professional and they do craft work. I have been downstairs looking at the work and it is extremely well done. They are thorough and clean. Read More - Angie's List Customer

Even the owner came by to make sure we were pleased with the work. I can't say enough about Charlie, our sales person and his follow-ups to my questions…Great! Read More - James A.

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