On Jul 2, 9:52*pm, " wrote:
On Jul 2, 9:38 pm, dpb wrote:

wrote:
I live in the upper Hudson River Valley(Albany, NY). The temperature
in the winter hovers around 25 degrees for about 2 months. My full
basement stays around 55 degrees. I know that it is considered very
impractical to install it outside. What are the pros and cons of
installing an air source heat pump in the basement? The relative mild
temperature there should allow for very efficient heating.

Far too small a volume--you'd heat or cool the basement faster than the
rest of the house. *Not feasible at all.

In that environment, your best bet is ground source of one kind or
another. *They're great--had one (Water Furnace brand, one of the best).

--

I am not sure what you mean by small volume. The basement is 1400
square feet, 8 feet high and the floor is 6 feet below grade. Are you
implying that the basement would cool so much that the heat pump would
not work efficiently?
Richard

That space will warm up as you cool the living area (cool down as
you heat the living area). That means it shortly will become very hot
or cold and will not allow the heat pump to function efficiently.

Your idea is a good one however. It is possible to put long pipes
into the ground and to move air through them to supply the heat pump.
Those pipes need to be about six foot below grade and you need a lot.
Local conditions will determine if the idea will work for you. I
have seen several people around me use that system.