Daewoo is nice... $5K Btu/h with a 10.2 EER for $69. Remove and discard
the hot coil and its fan, replace with a copper pipe tube-in-tube heat
exchanger, eg a 10'x3/4" pipe inside a 9'x1" pipe, with Us in the middle
and a bored-out 1" T and reducer at each end. Pump pressurized cold water
through it and back into a hot water pipe in summertime. Pump it through
a large EZ-Set pool in the basement in wintertime.

...1/2" internal pipe fits better, with a 4x1/2"x45 degree elbow U, and
at least 5KBtu/h/(110F-60F)/8/60 = 0.2 gpm of water flow, to make 110 F
water for showers with about 1/3 the usual energy...

With a COP = 10.2/3.41 = 3, the hot side would dump 4/3x5000 = 6667 Btu/h,
so we need 6667Btu/h/(110F-60F)/8/60 = 0.28 gpm of water flow, with how
much inner pipe, ie heat transfer surface?

Nick