This is my first post. I have a 19,300 gallon in ground freshwater swimming pool in southwest Ohio. The only problem I have with it is I don't get to use it as much as I'd like because the water doesn't get warm enough. This swimming season (Memorial Day to Labor Day) I got maybe two weeks when the temps got into the 80's.
So, I'm looking into installing a heater. We do not have natural gas and the logistics of install a propane heater are prohibitive. My only power option is electric. From what I understand, a heat pump might be okay when the air temps are warm but not so much when they are colder. That brings me to looking at a tankless water heater. Below is a website showing the unit I am considering tapping into the pools water system. It heats 5.3 gpm. In your opinions, what do you think? What can I expect to happen?