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A-1 Certified Service, Inc.
About the business:
At A-1 Certified Service Inc. in Knoxville, we prioritize your comfort by delivering exceptional HVAC services tailored to your home's unique needs. As a comprehensive HVAC contractor, we specialize in air conditioning and heating repairs, installations, and maintenance.
Our team of skilled technicians is dedicated to maintaining the efficiency and longevity of your systems. Whether you require air duct cleaning or insulation services, trust us to optimize your indoor environment for maximum energy savings and unparalleled comfort.
With a customer rating of 4.7/5, A-1 Certified Service Inc. has built a reputation as a reliable partner in home services within our community. We're committed to delivering quality workmanship, ensuring your HVAC systems run smoothly year-round. Choose us for unmatched expertise and exceptional service in the realm of heating and cooling solutions.
Services:
All services 7-
Air Conditioning Contractor
Book from $50In Knoxville homes, a faulty air conditioning system can be a summertime nightmare. That's where we come in! At A-1 …
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Air Conditioning Repair Service
Book from $50In Knoxville homes, we're the go-to for air conditioning repairs. When your AC needs fixing, rely on our skilled technicians …
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Air Duct Cleaning Service
Book from $50In a home's need for cleaner air, we step in with our Air Duct Cleaning Service in Knoxville. Our experts …
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Furnace Repair Service
Book from $50In Knoxville homes, a chilly winter can be uncomfortable. We, A-1 Certified Service, Inc., offer swift and efficient Furnace Repair …
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Heating Contractor
Book from $50In Knoxville, we're your go-to Heating Contractor. Our skilled team specializes in maintaining and repairing your home's heating systems for …
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Hvac Contractor
Book from $50In Knoxville, we're your reliable HVAC Contractor, delivering top-notch solutions for all your heating and cooling needs. We specialize in …
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Insulation Contractor
Book from $50In Knoxville homes, we specialize in enhancing energy efficiency and comfort through our top-tier insulation services. By expertly sealing and …
Photos and videos
Hours of operation
- Mon – Fri
- Sat – Sun
- 8:00 AM – 4:30 PM
- Closed
Latest reviews
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Kevin Alexander8 June 2026
Our tech, Zack, was incredibly helpful and knowledgeable. He advised on what was causing our issues and things we needed to do to maintain it.
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Gary Speer8 June 2026
For a few years I have relied on A-1 Certified for the usual service calls needed to maintain and sometime repair my heating/cooling system at my home. During the various service calls the consistency of the company's performance has never been a disappointment. Appointments are easy to make and their manpower pool enables A-1 to have a tech on site in a reasonable time. Josh responded to today's call. He was very quick to trouble shoot and fix the problem. His experience and knowledge was very apparent.
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Alexandra “MsOSheDidIt” O'Neal8 June 2026
I tried to get Bates and Tilley to show but couldn't. This company came to the rescue! I mean they were like Angels. I was without heat and air for weeks waiting for someone to install the new really did great work and couldn't have been more professional and friendly. Super happy with the whole experience and highly recommend this company! Love it when people actually do what they say they're going to do and it's a good experience with no problems. unit. Their guys showed up right on time,,
