Tapping The Earth For Energy Savings Year-Round

Increasing numbers of homeowners are installing geothermal heat pumps, which take advantage of the constant temperature underground to provide more efficient heating and cooling. Initial costs are high, but a 30 percent federal tax credit can make the systems more affordable.

Source: http://www.npr.org/2011/03/30/134602533/tapping-the-earth-for-energy-savings-year-round?ft=1&f=1007

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