[charlesfl]

Originally Posted by mejunkhound

Since no one has replied to you yet, I'll relate what I did to my ASHP.
We only need heat here in PNW, have not used AC more than 10 hours in the last 10 years.

Got an old condenser and txv free off CL, banded out an enlargement in the ductwork, kinda like the old A-kcoil AC add on to furnaces.

Bought a scroll compressor off ebay, made an evaporator by putting 3/4 cu pipe inside 1-1/4" pvc pipe, run the GSHP water thru the annular space. Groud water here is 54-56F year around.

Set it up so only the ASHP runs when it is > 42F outside (outside thermostat) , GSHP only if <42F and > 15F, both if < 15F (never has happened yet since the setup completed 15 years ago)

You could try something like that?

mejunkhound, how did you size your length of the evaporator per ton?

Thanks, charlesfl