I have been trying to figure out how to best use my electric heat pump, I got screwed by the local pool store so I am still waiting for my solar cover and reel. So this question is more about the best and most economical way to use a heat pump, so for the last two weeks I tried the following ways:
Week 1 - Got the pool to desired temperature for weekend swimming, the pump was on all weekend and was turned off Sunday night and left off until following weekend. The heat pump was turned on Thursday morning and was at the desired temperature by Saturday afternoon. So the heat pump was running day and night from Thursday morning until Sunday night.
Week 2 - Every morning during the weekdays when I turned on the pump/filter, I also turned the heat pump on. So basically this week every time I ran the pump/filter which is about 6 hours a day the heat pump ran with it.
So my questions is a heat pump like your AC unit where it is cheaper to just keep on and let it just maintain the desired temperature or just turn it on two days before use and let it run ?
So just some additional information, the desired temp is 85 degrees, I currently am paying 0.20 per Kwh, my heat pump is a 140,000 BTU unit and has a C.O.P of 6.
I know that the temperature for my area (Suffolk, Long Island) was lower during week 1 which would in turn would cause the heat pump to run longer to achieve 85 degrees but for the purpose of this question lets just say that the heat pump is working at a constant BTU output of 90,000.
Thanks for all you guys help, you have helped me make this the most enjoyable pool season we have every had.