Discover why geothermal heat pumps are the most energy-efficient technology for heating and cooling, and how all homesnew or retrofit, in hot or cold climatescan use this reliable, silent, non-polluting way of extracting free energy from the earth.

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The Smart Guide to Geothermal:
How to Harvest Earth's Free Energy for Heating and Cooling

Donal B. Lloyd

$19.95 paperback
ISBN 978-0-9773724-8-5
5.5 x 8.5, 192 pages
published 2011

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