On 19/10/2019 06:50, Rod Speed wrote:
Brian Gaff wrote

Am I being thick here,

Yep.

but is not the result of taking heat from the ground to heat a
building going to make the ground cold until it presumably gets so
cold no more heat can get in fast enough to keep heating the building?

Nope, there will always been conduction of heat
from the surrounding ground that avoids that. And
with ground sourced heat pumps you don’t get the
icing up you get with air sourced heat pumps.

Not cheap tho.


Solar gain on the site and surroundings is also a significant variable


--
Cheers, Rob