About Design Air

Design-Air Heating & Air Conditioning in in its second generation of family ownership and operation.

Founded by John Hall in 1977, and currently operated by John’s son Jim. We continue to grow and thrive, focusing on comfort and advances in technology. We serve both residential and commercial customers with sales, service, and installation of systems that are ideal for your home or business.

When it comes to your family or business, you want dependable air conditioning and heating systems that provide you with value as well as comfort. Turn to the Experts at Design-Air.

Whether it’s a new installation or routine service, our trained and highly experienced technicians have the knowledge your comfort depends on.

  • Carrier Factory Authorized Dealer
  • NATE certified technicians
  • Member Metro Decatur Home Builders Association
  • Member Decatur Chamber of Commerce
  • Member GAOI (Geothermal Alliance of Illinois)