2511 Byington Solway Rd
Knoxville, TN 37931
865-691-5088

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Local Reviews

Rated 4.9 out of 5 stars based on 155 customer reviews

Love their service!

I have used them for our HVAC and attic insulation needs. All experiences have been great! They do such a good job at explaining things & answering our questions. Their office personnel always keep you updated if schedules need to be shifted- good communication. They are also cost efficient!

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Always there when I need them, Great service

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Great service !

Juan was courteous and professional. He completed the work in a timely manner.

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Courteous, thorough, on-time service

I was pleased that Juan left a voicemail message announcing his pending arrival, arrived in the time range promised, completed his service checklist, then cleaned the coils and removed pad level debris from the outside unit. When I if Juan could add anti-rust tablets to the condenser pan, he said he could add them for a specific price, then did so. However, before leaving, he informed me that my out of pocket cost was actually less due to this being a prepaid service call.

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Awesome service and tech

Juan was very cordial, thorough and professional. He did not try to upsell me anything while providing maintenance service. You may want to confirm prices as they’ve had a rate hike since here last year. I wish the company would’ve made me aware of this when the appointment was made.

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Great service

Juan was very professional and Sid a thorough job of checking my units.

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Duct Sealing

Good job by Tommy & his team.

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Juan is a great technician for A-1

Juan came today to service my Dakin unit. He did a very good job and was very informative.

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Great service!

Juan was a pleasure and explained everything he was doing as he serviced our hvac systems.

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A-1 Certified has GREAT Employees

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Service Check

Juan was so nice! I could not be more pleased with his thorough work and his friendly demeanor.

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Great Service!

The service tech Juan was polite and professional. It was an overall good experience.

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Service review

Very good service

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Great service

Very friendly. Answered all my questions and was knowledgeable.

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Great technician

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Job Locations

Jason S.

Jason S. Job Checkin


Jason S.

Jason S. Job Checkin

Preventative maintenance

Preventative maintenance

Juan M.

Juan M. Job Checkin

Performing maintenance on a Maytag heatpump

Performing maintenance on a Maytag heatpump

Juan M.

Juan M. Job Checkin

Performing maintenance on a Maytag heatpump

Performing maintenance on a Maytag heatpump

Juan M.

Juan M. Job Checkin

Performing maintenance on a Maytag heatpump

Performing maintenance on a Maytag heatpump

Juan M.

Juan M. Job Checkin

Performing maintenance on a Maytag heatpump

Performing maintenance on a Maytag heatpump

Juan M.

Juan M. Job Checkin

Performing maintenance on American Standard Package Heat Pump

Performing maintenance on  American Standard Package  Heat Pump

Juan M.

Juan M. Job Checkin

Performing maintenance on American Standard Package Heat Pump

Performing maintenance on  American Standard Package  Heat Pump

Juan M.

Juan M. Job Checkin

Performing maintenance on American Standard Package Heat Pump

Performing maintenance on  American Standard Package  Heat Pump

Juan M.

Juan M. Job Checkin

Performing maintenance on American Standard Package Heat Pump

Performing maintenance on  American Standard Package  Heat Pump

Juan M.

Juan M. Job Checkin

Performing maintenance on a Daikin AC unit

Performing maintenance on a Daikin AC unit

Juan M.

Juan M. Job Checkin

Performing maintenance on a Daikin AC unit

Performing maintenance on a Daikin AC unit

Juan M.

Juan M. Job Checkin

Performing maintenance on a Daikin AC unit

Performing maintenance on a Daikin AC unit

Juan M.

Juan M. Job Checkin

Performing maintenance on a Daikin AC unit

Performing maintenance on a Daikin AC unit

Kris K.

Kris K. Job Checkin

Installation Daikin air conditioner unit

Installation Daikin air conditioner unit