Anyone have some experience using Geothermal heat with lake (or well) as heat source? This has been a summer home forever and I've got no forced air so thinking about radiant heat. The house is small (1000 s.f.) and it's a 1 1/2 story. The well is next to the house and the distance to the lake is about 80 feet. We haven't used the well for about 11 years but it is only about 40' down. We currently have a combo of gas insert and electric baseboard but whoa daddy - is it expensive! Hoping to have the U.S. Treasury help out on this, too.