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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. 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. Find out more info! Contact Charlie for Details.

Check out dates for all of our asphalt pavement preservation seminars. We offer a full range of service capabilities with the highest quality materials.

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A-1 Enterprises offers 24 hour, 7 days a week Water or. SERVING THE GREATER SACRAMENTO AREA, YUBA-SUTTER AND NORTHERN CALIFORNIA. , Yuba City, CA. The technician was very trustworthy, answered all my questions and made me feel so comfortable. I knew I could leave while he was still working if I had to. , Yuba City, CA. From A-1 came out and cle.