Number of Vacuum tubes: 20pcsAperture area 1.88sqmSpec. of Heat Pipe: diameter: 70mm x length: 1700mmVolume of heat collector: 3.8LThe amount of water up 35 x C under the standard situation: 170 LQuantities of inflow and outflow diameter: 22mmExternal for and dimension (width, height) (mm):2140 x 1790Water tank Capacity of Water tank: 200LExternal for and dimension (diameter, height) (mm):550 x 1550Size of Inner tank (diameter, height) (mm):435 x 1450Pressure: 6kgMaterial of Inner tank: 316L stainless steelMaterial of Outer tank: aluminum-zinc-platingAcreage of Serpentine heat transfer tube: 0.9sqmPower of Auxiliary electric heating: 2kwPump Shifts: one,two,three Rotation speed (Min-1):1450, 1900, 2200Voltage/Frequency (V/Hz):220/50Electric current: 0.2A, 0.3A, 0.4AAppliance protection grade: 42 producing area:China