Wall Geothermal is a licensed, bonded, and insured geothermal heating and air conditioning contractor in the State of Oklahoma. We offer residential and commercial geothermal system sales and service, including diagnosis and resolution of problem jobs. Wall Geothermal provides design engineering, project management, and turnkey geothermal installations. Our primary area for service calls is in Oklahoma City and any area within 1 hour drive of Oklahoma City. We will install geothermal systems anywhere in the State of Oklahoma.

Wall Geothermal owner Doug Wall graduated with a Bachelor of Science degree in Mechanical Engineering from the University of Tulsa in 1986. Prior to launching Wall Geothermal, Doug had 23 years of engineering experience. Doug’s HVAC engineering experience began with an architectural and engineering firm in Los Angeles, simulating commercial building cooling and heating loads, designing ductwork, and developing control strategies.

Doug then worked for HVAC manufacturers, including major conventional equipment manufacturers and a leading manufacturer of water source heat pumps. Doug’s experience in HVAC manufacturing includes project management, design, manufacturing, automated testing, and quality. Doug’s engineering experience includes product development of geothermal equipment.