Main functions of this solar water heater :

1.high absorption :the evacuated tubes apply the international advanced technical process ;it has higher absorption for the solar spectrum 

2.High insulation :thickened polyurethane thermal insulation ,apply the whole constant temperature ,foam under pressure ,through formalization it will have superior heat preservation 

3.Inner tank and inlet(outlet pipe ):SUS 304-2B ,great anticorrosion;

4.Stand:Galvanized sheet ,elegant appearance ,sturdy and durable 

5.Rubber seals and rings :silicone rubber, nonpoisonous and tasteless ,long service life .

Working Principle:

Compact Non-pressure Solar Water Heater relies on desity of the water, cold water down, hot water up, a cosmical physics, to circulat water through the collector and the tank. When water in the collectors is heated up, it becomes lighter and naturally rises into tank. Meanwhile, cooler water in the tank flows down to the collectors