50 000 BTU heat pump pool or hot tub heater. Used 2 summers for outdoor 23000 Liter pool to heat 30 C. Heater draws heat from air to warm water. Basic heater costs $ 4200. This Deal includes Heater stand, Sand pump to pump water to heater, Connectors , NPS 2 pool piping and hoses to flow water ( $ 1500 value). GFI disconnect box included Need 220 volt 30 amp power supply. Just Add water :)