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About Del-Air Mechanical

Comfort Has Been Our Career for 39 Years!

For over 39 years, Del-Air has been serving the greater Knoxville and East Tennessee markets as an unlimited licensed mechanical contracting and service company. Dwane Lay started this company in 1980 with little money, one service truck, and an unmatched determination to succeed. Today, with more than 150 full-time employees, Del-Air Mechanical continues to grow while maintaining the honesty, integrity, and professionalism with which this company began. We remain focused on our customer and employee needs.

Why Choose Del-Air Mechanical?

Del-Air is comprised of four main divisions that work as a close-knit operation providing commercial construction, HVAC, plumbing and pipe-fitting service to the educational, industrial, retail, office building, biotechnology, and manufacturing markets.

Our business practices include:

  • A robust Industrial Safety Program and trained workforce
  • An ISO-compliant Quality Management Program
  • Lean principles that are intentionally applied to all projects
  • Projects that 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
  • Utilizing Sage 300 construction management financial and project management software

But despite our grand size and extensive capabilities, we are a family owned and operated business. We’re small enough to treat each client with the individualized care and attention they deserve. When you contact our skilled Knoxville technicians, you can rest assured you are not just another number in our system—you are our colleague in the business community and we are here to make sure you succeed.

For commercial heating, AC, and plumbing services in Knoxville backed by over three decades of experience, call Del-Air Mechanical! We also serve businesses in Powell and surrounding areas.

Building Relationships

Read reviews from our happy customers!
  • Cannot say enough about everyone at Del-Air!

    “Cannot say enough about everyone at Del-Air!”

    - Katie DePersio, Executive Director, Tennova Health & Fitness
  • Del-Air has been an outstanding partner for us

    “The staff at Del-Air is friendly, personable, and easy to communicate with.”

    - James Lusby, Home Federal Bank
  • I have and will continue to recommend Del-Air to others.

    “We appreciate your service and hope to work with you again!”

    - Ryan Chinn, R&R Properties
  • Trustworthy

    “Excellent craftsmanship!”

    - Elif T
  • Satisfied Customer

    “I would highly recommend using Del-Air!”

    - Ryan D

Why We're the Premier Choice

Honesty, Integrity, Commitment & Professionalism.
  • Problem Solvers

    We look at the entire problem and provide realistic solutions for each and every job. By sending the same technicians out when possible we build strong relationships with existing customers.

  • Award Winning Service

    We are honored to have received recognition from great organizations including the ACCA and INC 5000. We will continue to innovate in the HVAC community and strive for perfection.

  • Safety First

    We are highly recognized for our Safety & Health Program. Our goal is to always provide a safe working environment for our team.

  • Longevity & Community Driven

    Family owned and operated in Knoxville since 1980. A staple in the community for professional work and stellar customer service.

Career Opportunities Looking for a career in commercial HVAC?

Learn more about what it takes to work in the fast paced HVAC, plumbing, construction and industrial industries.