wikipedia's got a good article on it. http://en.wikipedia.org/wiki/Geothermal_exchange_heat_pump The best way is to drill straight down about 200ft, that way you're barely affecting anything eco-wise. It's a bit more expensive to do it that way though. ^_^
no subject
The best way is to drill straight down about 200ft, that way you're barely affecting anything eco-wise. It's a bit more expensive to do it that way though. ^_^