Geo-thermal wells??ground temp vs. depth??

Question

depth vs. temp???
what cost?
what savings?
is it pratical to use in single home heating?
is it posible to use geo-thermal to heat and cool a house?
do you need 2 loops (one for heating and one for cooling)?
are there systems that do not use refrigerant for heating and cooling?


i live in southern wisconsin in the winter temps can get as low as 0 (on average 2 or less days below 0 F )
in the summer highs can reach 100 F

Answer 1

Unless you happen to live on an active caldera, no.

In Wisconsin you will find that ground temperature below the frost line, (probably about 36-40"), is fairly constant, (probably betw. 50-60 F.).
If you've got good ground water wells, (high yield),
or are willing to install a large heat transfer loop below ground to use the ground as a heat sink, you can use the difference between ground and air temperatures with a heat pump for both heating and cooling.
( it's a lot easier to pump heat from a ~60 F. source for heating in winter, and to it for cooling in summer than it would be to pump to or from ambient air).
The same loop can serve for both functions.
The installation is expensive.
Google or Wiki 'ground water heat pump` and you should get the whole story.