We purchased a new home this summer and it has a 40,000 gallon in-ground concrete pool that is in an enclosure. It is currently set up with a natural gas heater that is not working. It was a fairly mild summer and the water never really warmed enough so that it was comfortable to swim even with a solar heat blanket. I've been thinking about purchasing a heat pump to replace the boiler but I would like to heat the pool through new years then shut it down until early spring. Would a heat pump work in this climate? I was also thinking about going with a large Coates electric unit cause we are planning on putting in a grid-tie solar array.
I figure I will need around a 400,000 btu gas unit with an average temp of 23 degrees in Jan and Feb. At at cost of .52 per therm any idea what my daily costs would be??