The most basic type of solar water heater composed of a flat collector and a water storage tank. Solar water heaters are classified into two types,
which the difference depends on the way of solar energy absorption. One of them is in the form of absorber screens or (flat screens) another one is vacuum tube or (tube). According to climate and weather of Iran the priority is using tubular screens, because it has circular absorber screens which caused increase the absorption efficiency of solar energy and also decrease subsidence of containments and dust on the panel.
Energy House company’s solar water heater have all the European and authentic approval which represent various models based on water heating capacity at 150, 200, 250 volumes. All the water heaters equipped with digital water temperature viewer system and also the ability of observation the volume of water tank.