Your Company for Commercial & Residential HVAC, Insulation & More!
A-1 Certified Service takes a lot of pride in providing you with the absolute best in American-manufactured products. Whatever unit you choose from us, you can be sure that it was built using the highest quality components.More Info
There are very few hassles bigger than having to deal with a major home appliance breaking down, and it’s even worse when you have to wait to have it repaired. A-1 Certified Service wants all of our neighbors in the Knoxville area to know that we will be there for you when you need us the most.More Info
A-1 Certified Service now offers spray foam insulation in both open and closed cell. Spray foam is the best method of insulation your home's attic, walls, and crawlspace. Closed-cell spray foam will also air seal and water seal your home.More Info
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.