A-1 Certified Service Customer Reviews in Knoxville, TN

Excellent and professional service from Gabe and his crew. I cannot thank you enough for the crew were not only professional but very informative and very kind again thank you I am so very happy with the service your crew is in my opinion a very valuable asset to their company

Jamall from A1 – CSI was prompt, friendly, and thorough. He did a great job fixing our mini-split. I highly recommend this company.

The techs were incredibly nice and helpful. Trustworthy and polite. Knowledgeable about the systems being installed, and worked hard and efficiently. Would definitely use them again if needed.

If you are looking to have an HVAC system installed ductwork installed or well anything listed here look no further. This is the best company that I have “ever” dealt with. The workmanship is outstanding, and the people there are incredible. These guys are fast, knowledgeable, clean, and friendly. They come on time, they don’t cut corners, they explain everything they are doing, and they make sure you know how to use and maintain everything. They check and double-check all their work and they do it all with a smile. I wish I could keep them lol. I really wish I could have them repair and install everything that I need to be done to my house. Jacob, Tommy, Andy, Danny, Gabe, Aaron, and Zack; are the guys you want working on or installing heat and air, ductwork, thermostats, and so on. If you don’t choose them you don’t know what you are missing out on! Trust me these are your guys! And their HVAC unit is A1! Thank you guys for everything! I would recommend you guys every day and twice on Sunday. Your loyal customer Denise

Technicians were on time and very communicative. Even though the system was running “nominally” on arrival, they stayed until the unit experienced the failure described in the initial service call. They were both very respectful of our house and were observant of people and animals around the house. The next steps in fixing the system were communicated clearly as well as who we would be hearing from on upcoming parts and labor charges.

This company is very professional and helpful. I had Jamal Tyler and Ed Myers come out to my house and inspect my system. I also spoke with the owner Michele on the phone to coordinate parts and service. They all were very friendly and helpful. They gave me advice on my system and were very supportive to get me the best price and best support. I would highly recommend this company to anyone needing work accomplished on their system!

“ The technician Jason has serviced our heat pump three times now and does excellent work. He is attentive to detail and looks for little issues to correct before they become a big problem. He is friendly, prompt and very professional. We highly recommend Jason and A-1 Certified thus far! John & Tina ”

“ The technician Jason has serviced our heat pump three times now and does excellent work. He is attentive to detail and looks for little issues to correct before they become a big problem. He is friendly, prompt and very professional. We highly recommend Jason and A-1 Certified thus far! John & Tina ”