Since 2000, A-1 Certified Service, Inc. is your best choice for repair, installation, and service in homes and buildings just like yours in the Knoxville area. We take special pride in the craftsmen we train and employ--a fact you'll see in the reviews below. It's also noticeable immediately in the attitude and integrity our technicians bring to your job site. Our entire company works hard to make your experience with us hassle-free and enjoyable. You can also be assured that A-1 Certified Service, Inc. stands behind the work we do as well as complies with all local codes. This is why, as you can see by the map and reviews below, we are rated so highly for AC, Plumbing, & Furnace Repair in Knoxville, TN. Call us today at (865) 691-5088!
We received great service with a very quick response time! Tommy and Tyler were very professional and helpful. We will definitely use them again and would recommend them to others!
Prompt, efficient service from a friendly fellow.
The guys were friendly, showed the utmost respect to my Mom and her home. Josh, Tyler and Tommy were professional, answered all of our questions and did a great job! We plan to consider A-1 service in the future as well as recommend them to our family and friends.
Polite, quick and Easy
Very polite, checked out the unit on a timely matter, replaced my filters and explained my ticket so I understood what he checked out..
I had basic air sealing done at my home. Built in 1925, it’s very drafty and I’m hopeful the air sealing will make a difference in my KUB bill. Everyone I met with the company was personable and knowledgeable.
Marcus is always such a great guy...both on a business and personal basis. Knows his stuff!
Brandon was very nice and professional. Seems to have fixed problem! Thank you!
My heat pump went out twice in 72 hours during the extremely cold weather. Matt got it running again,took the time to research the history of problems and arranged for a warranty replacement of the heating unit. He was very professional and took the time to explain what he was doing.
I didn’t understand how they were going to fix my ducts and they explained it to me in layman’s terms. They cleaned up after themselves and everything looks great! I had some additional questions and they told me other services they offered. I use these guys for regular maintenance too. Will continue to call on them as this old house grows older!
Marcus was very knowledgeable and very helpful.
Mat was professional and courteous and experienced and arrive at a timely manner thank you
Very good and A-1 Service
I am so grateful for Ms. Shanda, Mr. Josh, Jimmy and Matt Mann. They were very professional, courteous and knowledgeable about the work they were doing at my house. They did not stop until the work was properly installed and perfect! Thanks to this crew...we now have great heat and awesome new windows. It works great and looks good too. Please acknowledge them for there great work, efficiency and effectiveness. They are truly an asset to your company! God Bless. Mrs. Bowman
Matt was our HVAC professional who was prompt, polite, knowledgeable, and skilled.
Service was excellent, courteous and informative
Our HVAC unit was under warranty through A-1. The heat pump wasn't working. They came out same day and got it taken care of under warranty.
Finished air seal and duct sealing under kitchen and garage.
Finished air sealing and home improvement.
Finished air sealing and home improvement
Amana heat pump re pair
New duct sox install on a commercial warehouse
Replacing dryer vent