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Wall Geothermal is a licensed, bonded, and insured geothermal heating and air conditioning contractor in Oklahoma, offering residential and commercial geothermal system sales and service. Our services include design engineering, project management, and turnkey geothermal installations. We provide geothermal heating and cooling systems that are more energy efficient than conventional air conditioners, gas furnaces, and air source heat pumps. Our experienced team, led by owner Doug Wall, a mechanical engineering graduate from the University of Tulsa, has 23 years of engineering experience in HVAC design and manufacturing. With over 30 years of experience in the geothermal industry, we have the expertise to design and install geothermal systems that meet the unique needs of each clients. Our primary area of service is Oklahoma City and surrounding areas within a 1-hour drive. We also offer free site assessments and quotes for geothermal system installations.