... V-COOL heat pump swimming pool heat pump water heater VX Series is specially developed for garden swimming pool. ... .5kw, 11kw, 13kw, 17kw, 21kw, 25kw, 31kw &50kw.* Titanium Heater exchanger PVC.* Eco-friendly gas R410A/R407C.* Lower noise level ... of V-COOL heat pump swimming pool heat pump water heater VX series: Unit ModelUnitVX230VX300Heating CapacitykW2125Cooling CapacitykW16.520.5Power InputkW4 ...