1.High quality s/s housing, instant heating. all copper pipe with 2.Different capacity options 3.Tankless, energy saving Capacity Options: 6L ... : 10KW, 12KW, 14KW, 16KW, 18KW, 20KW, 24KW, 32KW, 40KW. Rated hot water output: 5 L/min, 6 L/min, 7 L/min ...