Fibropool fh120 20,000 BTU 120 Volt Swimming Pool Heat Pump. Bought this new and have used for 4 or 5 seasons, it works well but does require some time to hit your desired temp. These go for approx. $1,299.00 new and $1000.00 refurbished. I can answer pretty much any questions you have about how this works if your interested. I have to say this heater got us many more days of use out of the pool especially towards the end of summer. Works best if you use a solar cover also.
Technical Specs:
20,000 BTU output
Heat above ground pools up to 15' round or 12' x 18' oval
Heat in-ground pools up to 5,000 gallons
Outputs 4.81x heat for every $1 of electricity
Runs on standard 3 prong, 120v outlet
Rated to heat water to 82 degrees while operating at 82% humidity.
Features
Simple digital controller
Weatherproof enamel-coated steel case to withstand elements.