●good water quality,It use tap water directly, live water but not sedimentary water.
●take advantage of the tap water's presssure, more pressure, more confortable
●no scale, high efficiency,Water in the tank wouldn't be used just to heat the coil, the water in the tank will keep hot and no scale.
●Simple to install,if only for hot water you can install the system at any place facing the sun.
●Longer vacuum tubes and thicker insulation layer ensure better efiiciency, arrice55mm
●anti-freezing,Because of all hot water in main tank, the feed tank won't be frozen