Have You Considered Geothermal?

I knew in theory that tapping in the Earth’s inexhaustible energy is efficient and friendly to the environment. Ten feet below the surface, the ground is a steady 55 degrees year-round, regardless of the air temperature. By circulating liquid through embedded pipes and into a heat pump, the warmth of the earth can be pulled into a house during the winter and excess heat can be sent underground during the summer. A ground-source heat pump doesn’t have to work as hard as one using air as its source because it doesn’t have to cope with extreme temperatures. (For more detail, see https://www.energy.gov/energysaver/heat-and-cool/heat-pump-systems/geothermal-heat-pumps)
But I hadn’t considered geothermal for two reasons: our in-town yard is small and a system couldn’t be affordable. Nevertheless, I was intrigued enough by the idea to search out local installers to explore the feasibility and cost.
Much to my surprise, a system did fit our backyard and budget. Three holes, 15 feet apart, were dug down 300 feet to hold plastic pipes in closed loops. The installer quickly and easily obtained a county permit, and the work was completed in only two days.
The main logistical challenge was getting the drilling equipment into the yard, but luckily our neighbor gave us permission for the trucks to cross his lawn after we promised to fix any damage they might cause. Three sections of fence were removed and later restored. Today there is no visible sign of the system.
The installers replaced the oil furnace in the basement with the new heat pump, where it is protected from the weather and expected to last many years. They took away the old furnace and oil tank. We also had the air handler in the attic replaced. An added bonus is that the system’s surplus summer heat is stored as hot water, further reducing ongoing energy costs.
All this cost $31,000 up front. The State of Maryland granted a one-time $3,000 Clean Energy Rebate Incentive. Plus, the federal government granted a 30 percent tax credit, which has come in handy when preparing our income tax returns; the tax credit can be carried over year-by-year as needed. With these incentives, the system cost us less than $19,000.
Our oil bill is gone. In combination with the solar panels, our electric bill with Delmarva Power averages less than $60 per month year-round, about a third of which is for heating and cooling. The house is warm in winter and pleasantly cool all summer.
It will take a few years for the system to pay for itself, but it’s comforting to know that our ongoing expenses are very low. A geothermal system is a no-brainer for any new house. But even for existing houses, such a system might make sense. Check it out.
Passionate patriot Jim Bogden has been an Eagle Scout, Peace Corps volunteer, education administrator, public health policy writer and advocate, adult educator, disaster relief worker, and librarian. He was raised in Oregon, spent 25 years in Washington DC, and chose to live in Chestertown three years ago.
Common Sense for the Eastern Shore




