I already got a heat pump water heater and I love it! I'm totally in the market for a heat pump heater to replace our Heater/AC. the primary concern are three things: up front cost, and electricity costs for heating and 3) performance. the last quote I got was about 11K, so that's pretty steep. and on top of that heat pumps don't perform well for heating: it has to be on most of the time and will struggle to increase temps.