Design-Air Heating & Air Conditioning

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.

Design-Air can also provide a geothermal alternative to traditional heating and cooling systems. WaterFurnace® geothermal comfort systems, provide up to 75% lower operating costs, safe, clean, and quiet operation, are environmentally sound, and provide reliable operation. With hundreds of WaterFurnace® systems installed, Design-Air has the knowledge and experience to provide you with an environmentally sound geothermal system for your heating and cooling comfort.

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
• WaterFurnace GeoPro Master Dealer
• NATE certified technicians
• Member Metro Decatur Home Builders Association
• Member Decatur Chamber of Commerce
• Member GAOI (Geothermal Alliance of Illinois)