[bert]

I want one

I want to map the certain caavernous passages under my yard

I can drill a shaft and pump 55 degree air. Cool in summer warm in winter

[The_Republic_Of_Maine]

good idea

[pepsi_junkie]

I can drill a shaft and pump 55 degree air. Cool in summer warm in winter

I hope the EPA doesn't get wind of the plan, they hate it when people get clever without checking with them first so they can kill it.

[Rebelbase]

I know a guy who has small lake on his property next to the house. He drained the lake and ran heat pump hose under the lake bed.

Cool in the summer, warm in the winter.