Principle of ZWNS vacuum hot water boilerThe boiling point of water at one atmospheric pressure (1bar) is 100˚C. When the pressure is lower than 1bar, the water boiling point is less than 100˚C. For example, when pressure comes to 0.7bar, then boiling point will be 90˚C. 0.3bar is related to 70˚C boiling point. The pressure is 0.1bar and the boiling point is 40˚C.The closed chamber inside the vacuum hot water boiler forms a vacuum chamber after being pumped through the vacuum. The combustion causes the heat medium water to boil and vaporize in the vacuum chamber to produce negative pressure water steam. The steam condenses outside the heat exchanger tube, and the cold water in the tube atmospheric pressure hot water boiler is heated and heated to the user. The normal working pressure of boiler is less than 0.7bar. Heat medium water is a special treatment of high purity water such as descaling and deoxidation, which is filled by the factory before leaving the factory. When used, it ...