Energy 101: Geothermal heat pumps (Video)
Geothermal is one of the hottest topics these days as people seek cost-effective ways to heat and cool their homes.
Many people have questions, including how a geothermal heat pump actually works. This handy video from the U.S. Department of Energy explains how a geothermal system uses the heat stored below the surface in the ground, which is essentially solar energy since the earth is heated by the sun, to provide heating, cooling and hot-water assistance.
Outdoor air temperatures fluctuate from season to season, but ground temperatures are constant throughout the year, approximately 50 to 55 degrees Fahrenheit on average, depending on the region. The geothermal system transfers heat from the ground to the house in the winter, and transfers heat from the house to the ground in the summer.
Watch how it all comes together in this video:
Read more about geothermal heating and cooling.
Teena Hammond Teena Hammond has published more than 2,000 articles in People and W magazines, Women's Wear Daily, and in dozens of newspapers and books. She also wrote a home improvement, remodeling and decor column that ran in Gannett newspapers nationwide. She's interested in all things green and would love to hear from you with your story ideas.