My brother-in-law would like to add a heater to his in ground pool before the season starts this year. Without the heater he's not seeing temps much higher than 72*. He had talked to a neighbor who had claimed he had a unit that was a heater for the pool, and a heat pump for the house. After looking around and also posting on here, I see that there really isn't anything like that out right now.
So now he is asking me whether he should go with a gas furnace or a heat pump. He has gas already to the shed where the PO had removed the furnace. While I was doing some research, I basically came up with these things to consider. The furnace will be cheaper to purchase than the Heat Pump, but will cost more to operate. Also that the furnace will heat the water faster, while the heat pump takes longer.
We live in the Pacific Northwest (Tacoma, WA). Our pool season is about mid may to the end of September. Can anyone steer me in the right direction for my brother? I figure when we do decide what's best, the better way to go is to purchase it online and install either ourselves or hire somebody. Any and all help and recommendations is much appreciated.