I do like the idea of ground source heat pumps. If we all lived in caves hundreds of feet deep, the temperature would be near perfect year around. In a way, the

I do like the idea of ground source heat pumps. If we all lived in caves hundreds of feet deep, the temperature would be near perfect year around. In a way, the heat pump “brings the cave to the surface”. There’s something very satisfying about this design, we’re not using technology to insulate ourselves from the Earth — we’re working directly with it.