A-1 Certified Service, Inc.

A-1 Certified Service, Inc. is a full-service HVAC, insulation, and Home Performance company serving the Knoxville area. Customers have expressed great satisfaction with the company's professional and personable technicians, who are experienced, courteous, and knowledgeable. The technicians communicate well, work hard, and are dedicated to providing exceptional service. Customers have found the company to be reliable and have used their services for both personal and business needs, always receiving professional and quality work. Overall, A-1 Certified Service, Inc. is highly recommended for HVAC repair, replacement, and installation services.