Anyone using pool heat pumps to either heat water for heating house or cooling water to spit out hot air in the house? The prices on some of these are pretty low for a water-air heat pump.
Example (there are many in the $600-$1000 range for nominal nameplate heat output):
Claims up to 4.45x COP but that's for extremely advantageous conditions.
Settable to heat water from 59F-104F (meaning rejecting cool air). Settable to cool water (meaning rejecting hot air) from 46F-82F. In heat mode, outside air range from 23F-109F. The advised flow rate is pretty high (600-1000 GPH) compared to traditional ground source heat pump systems.
Cost: $599. Minimal reviews
Where I am in CO, the ground temp I believe is just over the cool water minimum, which means it wouldn't work directly with the unit inside blowing hot air and the pipes connecting to coils of plastic pipe buried in the yard.
I can think of a few ways to "assist" the heat pump to get going but all require extra energy input (sun, warm ambient, etc). It might also be possible to rip out the provided controller and do a DIY one to get some low temp run time going. Of course the COP would plummet. But getting COP of even 1.5 is better than resistive heating during cold snaps.
Example (there are many in the $600-$1000 range for nominal nameplate heat output):
Claims up to 4.45x COP but that's for extremely advantageous conditions.
Settable to heat water from 59F-104F (meaning rejecting cool air). Settable to cool water (meaning rejecting hot air) from 46F-82F. In heat mode, outside air range from 23F-109F. The advised flow rate is pretty high (600-1000 GPH) compared to traditional ground source heat pump systems.
Cost: $599. Minimal reviews
Where I am in CO, the ground temp I believe is just over the cool water minimum, which means it wouldn't work directly with the unit inside blowing hot air and the pipes connecting to coils of plastic pipe buried in the yard.
I can think of a few ways to "assist" the heat pump to get going but all require extra energy input (sun, warm ambient, etc). It might also be possible to rip out the provided controller and do a DIY one to get some low temp run time going. Of course the COP would plummet. But getting COP of even 1.5 is better than resistive heating during cold snaps.