"Paul" wrote in message
...
Rod Speed wrote:


"George Miles" wrote in message
...
I was thinking if i ever get a Air Source heat pump
then maybe have the inlet pipe in the cellar?

Because in the winter the cellar is warmer than the house,
- it gets heat from the earth.

Is this a good idea or daft?

Daft. The conductivity of the earth is poor.

You can get around that with non air sourced heat pumps
because the ground coils are sized to work properly but
that isnt possible with a cellar.

https://en.wikipedia.org/wiki/Geothermal_gradient

"The top of the geothermal gradient is influenced by
atmospheric temperature. The uppermost layers of the
solid planet are at the temperature produced by the
local weather, decaying to approximately the annual
mean-average temperature (MATT) at a shallow depth;

it is this depth which is used for many ground-source heat pumps,
sometimes loosely referred to as "geothermal heat pumps" by
laypeople. The top hundreds of meters reflect past climate change;

descending further, warmth increases steadily as interior
heat sources begin to dominate."

Yeah, its a well known effect with the deepest mines.

Now, get diggin :-) Your free energy awaits.

Um, you'll probably have to dig lower than the cellar...

Just a tad.