Geothermal heating is possible in most places even without volcanos or hot springs that Iceland has. The temperature of soil just 0.5m under the surface is almo

Geothermal heating is possible in most places even without volcanos or hot springs that Iceland has. The temperature of soil just 0.5m under the surface is almost constant over the year, and soil due to huge thermal mass can act as an excellent free heat reservoir during the winter. All you need is a sufficiently large area of land to burrow your heat exchanger pipes, and a simple ventilation system (that can easily be solar powered).