Vacuum boiler heat transition flow:
Oil, natural gas - > combustion - > heat medium water - > after boiling, steam change to condensing water - > heat exchanger heat transfer > hot water supply

Advanatges for Vacuum hot water boiler:

1. Safety
There is no danger of expansion, explosion or rupture during negative pressure operation;

2. Long service life
The heat medium water heat exchange system is used, there is no scaling and corrosion phenomenon, the boiler maintenance and after-sales problems are reduced, 

and the service life of the boiler is greatly increased;

3. Exemption from inspection products
Negative pressure operation products, the relevant state departments are exempt from inspection and supervision;

4. Small size
Can be placed in the basement and roof, more conducive to the boiler room configuration, modular parallel connection;

5. Environmental protection
The measured minimum emission of NOX is 20mg/m3, in line with the most stringent environmental protection standards;

6. Energy saving
The measured air consumption of the 0.7MW hot water boiler in one hour is <60m3, which is far lower than the industry data.