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.
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.
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In addition to any available rebates, taxpayers may also claim a percentage credit of qualified expenditures for a geothermal system that serves a dwelling unit. The residence must be located in the United States, owned by the taxpayer, and used as a residence by the taxpayer. The home does not have to be the taxpayer's principal residence.
Reviews (10)
Tom Reynolds
Jul 01, 2021
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We purchased a Series 7 Water Furnace package unit with optional water heating about three years ago. I do not write reviews until there is a track record. In this case, the unit installed by Doug Wall has performed well, meeting / exceeding expectations. Our home is two story and conventional contractors wanted to install two units. Doug used zoning and one unit. One zone covers upstairs and one downstairs. With the combination of a variable speed unit and zoning, this has worked out perfectly. I recommend Doug Wall and would do this install again.
Alan Rutledge
Apr 02, 2021
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Positive: Professionalism, Quality, Responsiveness
Without question the best attention to detail and pride of workmanship I’ve seen from a contractor in any trade. There are not many folks like this left in the industry.
Services: HVAC maintenance, Duct and vent installation, Heating maintenance, AC installation, Installation, Heating system installation, Duct and vent repair
Without question the best attention to detail and pride of workmanship I’ve seen from a contractor in any trade. There are not many folks like this left in the industry.
Services: HVAC maintenance, Duct and vent installation, Heating maintenance, AC installation, Installation, Heating system installation, Duct and vent repair
Carmen Crafton
Mar 26, 2021
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I didn't know who to call to fix our aircondicioner, it's geothermal and l don't know much about it, especially who to call for. I just went on line and called wall geothermal because it looked like they were close to me, had to take a chance, my aircondicioner was not working on the hot summer. Glad l did, they are very professional and did a great job, Doug is very knowledgeable and answered all my questions
Bluemoon Island Web Design
Dec 15, 2020
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Doug Wall is the most competent, reliable, knowledgeable engineer who has ever worked on our geothermal system. We purchased our house a year ago and have had problems with heat and AC continually until we found Wall Geothermal. Doug came out on an emergency basis and stayed working on our system until well into the night. We had family from out of town and almost no AC - he got our system working the best its ever functioned and we have had spectacular AC for weeks now!!! I cannot recommend Wall Geothermal enough. He found the problems (some created by other companies trying to figure and fix
Dan Boyd
Dec 12, 2020
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Doug did an excellent job correcting installation issues with our geothermal unit and replacing a fused switch. He was very careful and kept us appraised of what he was finding as he went. We were really appreciative of his staying much longer than he thought he would have to and explaining all of the ins and outs involved with our system.
Debbie Evers
Jun 01, 2020
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
We were so glad we found Doug. We are finishing out our basement Doug's bid came in much less even though he quoted a better brand. His communication was great, he was reliable, the unit works great and passed inspection with ease. Just wish we had found him sooner when we built our house.
Services: AC installation, Installation, Heating system installation
We were so glad we found Doug. We are finishing out our basement Doug's bid came in much less even though he quoted a better brand. His communication was great, he was reliable, the unit works great and passed inspection with ease. Just wish we had found him sooner when we built our house.
Services: AC installation, Installation, Heating system installation
Brad & Marie New
May 07, 2020
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Michael Atchley
Nov 04, 2019
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Our experience with Wall Geothermal was very satisfying. We upgraded from the typical air-to-air heat pump to geothermal. At all points in the process, Doug communicated well and appropriately, and arrived when expected. He is very knowledgeable, did much of the work himself, and did not cut corners. Once he was working on-site, he kept at it, pulling long days, minimizing the time we were without heat/air. He also corrected some ducting problems he found during installation. I highly recommend Wall Geothermal.
LeighAnn Barr
May 22, 2019
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I bought a home with existing Geothermal unit that was quite aged. Mr. Wall has been providing reliable service to try to get as much mileage out of the unit as possible. Finally had to replace it last month. Mr. Wall is, in my experience, the most conscientious person I've ever gotten to work with. His work is meticulous! I have full confidence working with Wall Geothermal. And my new unit is super quiet. I'm very pleased!
Greg Allen
May 21, 2019
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Very professional and meticulous attention to details. Was here at exact time scheduled. Extremely knowledgeable about equipment. Made suggestions pertaining to maintenance items and increased efficiency of unit. Pointed out items to improve monitoring and safety of equipment operation. Exceptionally detailed and clean in all service work performed. Highly recommend for anyone with ground source system.
