A-1 Certified Service offers a range of HVAC services, including heating, ventilation, and air conditioning repair and installation, throughout Knoxville, TN.
Operator computes a Health score every night at 2 am HST. It is the one number that tells you if this shop is winning, losing, or steady. Here is how A-1 Certified Service broke down on Apr 26, 2026.
Operator ranks every hvac services in Knoxville every night at 2 am HST using reviews, response rate, and local market share.
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