Questions Frequently asked questions about GeoThermal comfort systems What are the components of a geothermal heat pump system? Is a geothermal system difficult to install? I have already have ductwork, will it work with this system? Do I need to increase the size of my electric service? Can a geothermal heat pump be added to my fossil fuel furnace? Do I need a back-up heat supply? Can I install an earth loop myself? Will an earth loop affect my lawn or landscape?