About Us

For over 35 years Del-Air has been serving the greater Knoxville and East Tennessee markets as an unlimited licensed mechanical contracting and service company. Del-Air Mechanical is a closely held family owned organization founded by Dwane Lay who continues to serve as our Chief Executive Officer. Dwane has guided the company through 35 years of continuous growth and prosperity from one service truck to over 150 full time employees, Del-Air always remains focused on our customer and employee needs. Our company has been built on a solid foundation of Honesty, Integrity, Commitment and Professionalism.

Del-Air is comprised of five main divisions that work as a close- knit operation providing commercial construction, plumbing, pipe fitting and HVAC Service to the following markets: Educational, Industrial, Retail, Office Building, Biotechnology and Manufacturing.

Del-Air Products, Services and Capabilities:

Business Practices:

  • Del-Air maintains a robust Industrial Safety Program and trained workforce, 2014 Mod rate .62
  • Del-Air Maintains an ISO Compliant Quality Management Program
  • Lean principles are intentionally applied to all projects, projects are thoughtfully planned to increase productivity and reduce wasted time, manpower, and materials.
  • Project management best practices are focused on improving each project performance for all stakeholders.
  • Unlimited Bonding Capability, strong financial stability
  • Del-Air utilizes Sage 300 construction management financial and project management software

Key Capabilities:

  • Chillers – centrifugal, screw, reciprocating, and scroll compressor technology
  • Boiler and burner installation and maintenance
  • Compressors, blowers, fans, air dryers
  • Cooling towers, cooling systems and closed circuit coolers
  • Gas Vaporizers
  • HVAC air conditioning, humidity control and heating systems, service and installation
  • Oily Vapor mist removal and mist control separators
  • HEPA and other air filtration systems
  • Furnaces and heated process equipment
  • Sheet metal and HVAC duct fabrication shop, New automated duct coil line April 2015
  • Clean rooms and laboratory systems
  • Medical and industrial gas system installation and maintenance
  • Facility mechanical automation systems
  • DISTECH, Johnson Controls, Automated Logic, installation, programing & maintenance
  • Computer room cooling and humidity control
  • Plumbing installation, inspection and service
  • Pipe fabrication shop with specialized, certified welding processes
  • Glove box and laboratory hood installation and maintenance
  • Heat exchangers, heat and energy recovery projects
  • Variable speed drives and control systems
  • Water purification, reverse osmosis and deionized water systems
  • Underground Utilities and excavation
  • Variable volume refrigeration systems
  • Water treatment facilities, construction and maintenance
  • Storm Water systems
  • Medical and industrial gas distribution systems installation and maintenance
  • Vacuum pumps and vacuum systems
  • Fabricated structural and equipment supports
  • Life Cycle Management of all products and projects
  • 24 hour and 7 day week service