Contents include: • Geothermal system options, including open-loop, closed-loop and DX configurations, using horizontal and vertical earth loops • The importance of finding a qualified contractor • Costs, tax credits and payback issues, plus calculating increased home values • Who is using geothermal energy, including the author’s firsthand experiences, home profiles from around the country as well as an overview of commercial / institutional projects • How solar electricity can be used to power the system, plus other future trends • Unraveling the science and technology of geothermal heat pumps (GHPs) •Understanding GHP performance standards, ratings and warranties • Comprehensive appendix with helpful resources (manufacturers, associations, etc.) and a career section for those interested in entering the field