See, for more information:
Geothermal heat pumps
installation
Hundred per Cent Renewable with Ground Heat Pumps?
For a 100% renewable solution,
you may install a
solar PV solar
Photovoltaic system or a
wind system to provide the electricity needed by the heat pump
system.
More information:
Heat Pumps Basics
Geothermal heat pumps
installation
Air-source Heat Pumps



