On Mar 7, 3:34*pm, Ohioguy wrote:
* *The heat pump in basement idea is interesting, but would not work
unless you had some way to increase the surface area for heat transfer.
* For example, if you had buried a network of pipes in the floor before
pouring the cement, you could circulate water through there, and then
have it go through a radiator. *Behind the radiator you could have a
squirrel cage/centrifugal blower. *Your only cost to maintain the air
temp in the basement would be for an efficient water pump and efficient
squirrel cage blower. *This could make a heat pump very efficient.

* *Of course, if you have that setup, it would be much better to simply
use a heat pump designed to directly work with the water or whatever
fluid is in the pipes. *That would be a geothermal system.

There's nothing wrong with a heatpump in the basement. But the
evaporator needs to be outside.