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Top-Rated Geothermal heating or cooling system installers in Union City - Updated Nov 2026

Avatar for Advent Heat, Air, Plumbing & Electrical
Advent Heat, Air, Plumbing & Electrical
4.6(
168
)
Geothermal Heating or Cooling System - Install

Serving Union City, OK and surrounding areas

In business since 1991

Free estimates

Credit card accepted

"Great. They were very fast and punctual. Fixed the problem quickly. Very fair price to replace a AC compaciator for $170 and they checked/cleaned the system as well. I would recommend anyone in the Newalla area to use this company."
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+9

Recommended by93%of homeowners
Avatar for Airco Service Inc
Airco Service Inc
4.6(
429
)
Geothermal Heating or Cooling System - Install

Serving Union City, OK and surrounding areas

In business since 1961

Free estimates

Emergency services offered

"We have used Airco for annual maintenance on our home HVAC.  Our upstairs unit has had a coolant leak for a while.  Other servicers wanted to just top up the coolant, which has been getting more expensive with the rising cost of coolant and government regulations.  Airco checked for the source of the leak and determined that it was in the evaporator coil.  Government regulations do not allow replacement of just the coil since it uses R-22 coolant.  Airco sent someone to check our cooling needs, measured the area to be cooled and advised on the size of unit needed.  I asked about getting a larger unit with more heating and cooling capability but they said that it would be a waste of money (although it would have been more money for them).  They also advised on the different units available and credits available for installing a more efficient unit then what we had.  We selected a unit and within a week it was installed and operating.  It working great, and we're even letting it carry some of the load for our older unit which covers the downstairs zone in our home."
Recommended by92%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Geothermal Heating or Cooling System - Install

Serving Union City, OK and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
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Recommended by97%of homeowners
Avatar for Bnd mechanical
Bnd mechanical
5.0(
10
)
Geothermal Heating or Cooling System - Install

Serving Union City, OK and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Super fast response and reasonable prices. We used BND Mechanical to pull our A/C coil so Enviroduct could get to the plenum to seal and repair it. BND took the coil out and returned when Enviroduct was finished to put the coil back in. The technician added freon at no charge since it was a bit low. He was also going to clean and service both of our systems but he said one of them was in such good shape, it didn't need it. He also discovered a code violation in one of the units (they had used flex line inside the furnace when it was supposed to be rigid pipe) and fixed that for only $25 more. I was very impressed with how quickly they got here and returned to coordinate their work with the work I was having done on the ducts. I would definitely recommend them if you want honest, quality work at a fair price!"
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Recommended by100%of homeowners
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