Geothermal.contractors

Design-Air Heating & A/C, LLC stands as Illinois's largest downstate geothermal dealer, serving Decatur and surrounding areas with comprehensive heating and cooling solutions since 1977. The family-owned company specializes in closed-loop geothermal heat pump installation, loop-field design, and geothermal retrofits for residential properties seeking superior energy efficiency. Their electric and hydronic geothermal radiant systems deliver twice the lifespan of traditional HVAC units, translating to significant long-term savings. With over 300 combined years of team expertise, Design-Air employs exclusively NATE-certified technicians and maintains Carrier Factory Authorized Dealer status. Beyond geothermal services, the company offers in-floor radiant heating, ductless mini-split systems, furnace installation, and commercial HVAC solutions. Current owner Josh Mower, a Decatur native with 20+ years of company experience, prioritizes customer satisfaction and technological advancement. Boasting a 4.3-star Google rating across 47 reviews, Design-Air Heating & A/C provides after-hours service and indoor air quality solutions for homes and businesses throughout central Illinois.