See the other comment with the YouTube video. He argues at one point that it's more efficient to burn the gas for energy and power the heat pump with it, then i

See the other comment with the YouTube video. He argues at one point that it's more efficient to burn the gas for energy and power the heat pump with it, then it is to use the gas for heating directly. I imagine that might hold for the pool too. Though it would probably be a little less efficient since the water temperature would probably be higher than the air temperature inside the house.