| • | Combustion pre-heaters to raise the efficiency of the heater to over 92%; |
| • | Expansion tank with integrated instruments device; |
| • | Collection tank; |
| • | Nitrogen cover system; |
| • | Circulation pump and valve group; |
| • | Fully automatic control system; |
| • | Flow control for multi-consumers; |
| • | Filling and discharging unit; |
| • | Secondary circulation unit for different temperature requirements; |
| • | Automatic inert gas extinguishing system; |
| • | Silencer（For WHRU）. |
