Design-Air has been serving the heating and air conditioning needs of clients in Decatur, IL and surrounding areas for over 30 years. Our family owned and operated business offers sales, service, installation, and repairs of all makes and models of HVAC equipment. Design-Air is your choice for geothermal expertise.Our residential and commercial customers depend on us for: Air Conditioning Fireplaces Furnaces and heating Gas Piping Heat Pumps New ConstructionWe offer a more energy-efficient and eco-friendly services to our clients. Here at Design-Air, we are not comfortable until you are. Our technicians are ready to serve you and we are available 24 hours for emergency situations.For routine maintenance or emergency service, call Design-Air today!