daestrom wrote:

...The net COP is about 1.6.

Were do you get this particular number?

From a fairly new Kenmore dehumidifier with a kWh meter and a measuring cup.

But air conditioning a basement seems more efficient, and ACs cost less, and
they can be used all year, and they don't require an air-air heat exchanger.

At 54.3 F (Phila deep ground) and 100% RH, Pw = e^(17.863-9621/(450+54.3))
= 0.430 "Hg. At 60% RH with 100APw(1-0.6) = 5340 Btu/h (an ASHRAE swimming
pool formula), we might keep a $69 10.2 EER Daewoo AC busy with A = 310 ft^2
of basement floor.

Nick