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pls contact linna.mb0086-*******3635 msn*****skypelinnaniu1 qq*******85 The heater is a solar domestic water system comprising all-glass evacuated tubular collector with water-in-glass manifold. It is non-pressure system. It has air vent connected to the air in the tank.The series solar water heaters employ the natural convection phenomenon called "thermosyphon", which results in hot water being lighter than coldwater. The water heated in the tubes rises through the solar collector to enter the storage tank, while the cold water at the bottom of the tank flows into the tubes, creating continuous circulation. The convection flow will continue as long as the sun is heating the collector. solar, water, heater 19" standard aluminum server chassis subrack al enclosure
