If you are thinking of or have decided to install a Geothermal Heat Pump System, then Castleman Drilling can help you complete your project in an efficient and timely manner. Our company is equipped to complete everything from the drilling of the geothermal boreholes, installation of loops, grouting the boreholes with thermally enhanced grout, excavation for piping, headers, butt an socket fusion, adding antifreeze, and purging the unit.

Castleman Drilling operates its Geothermal Division under Tennessee license number #897.

Castleman Drilling is also certified as an IGSHPA Geothermal Accredited Installer, ID number #18540-1108.


For a closed loop system, water mixed with antifreeze is circulated through the buried pipes and pipes down the boreholes deep into the earth. During the winter, the fluid collects heat from the earth and carries it through the system and into your home. During the summer, the system reverses itself to cool the home by pulling heat from the home, carrying it through the system and placing it in the ground. This process creates free hot water in the summer and delivers substantial hot water savings in the winter.

30% Federal Tax Credit with no Cap!!!

Vertical Loop

Horizontal Loop

  • Lower Operating Cost-means more savings for you.
  • Geothermal delivers from 300-400% efficiency rating, while the most efficient gas furnace has a rating of 94%.
  • Geothermal systems last longer than conventional systems because they are protected from harsh outside weather. All components of a Geo are inside or buried underground.
  • Lower maintenance than a conventional system.
  • Geothermal systems have no outside units that are noisy to disturb outdoor activities, or pose any potential threat to children or animals.
  • Can be a combination heating/cooling and hot water heating system.
  • Positive cash flow; savings exceed the cost.
  • Environmentally friendly.

Castleman Drilling
5230 Highway 70 East | McEwen, TN 37101 | Office: 931-296-3800


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