jcrian

“Heat conductors” are placed one meter under the surface of the earth, these take in heated fluids pumped up though a “heat pipe” by a “heat pump” some 100 meters lower down

100 metres down is a heck of a hole and I hope nothing goes wrong with the pump if it's at the bottom.One or two places round here are having a similar installation including the local church.From what I've heard they clear the site(you need a big garden) and lay the pipe about 2 mts down.Makes sense as even at this depth the temperature has got to be a lot warmer than on the surface.I wonder how cost effective it is taking into account all the installatiion costs compared with a modern boiler which these days are very efficient.