Mixing macintosh and jonathan apples.

All a heat pump is is an air condition unit in reverse.--same tecnology. But the extracted heat is used to heat the water and the resuting cool air is dumped into the air. You can heat your home with, then reverse it in summer to be an A/C unit.

There is a system where you can water-cool your a/c, rather than air cool it and have that cooling water be your pool water. This is not a heat pump.