What are closed hot water supply systems and open systems?

Why do public baths need to be open?

Closed system: The water in the system is not in direct contact with the outside air.

Open system: The water in the system is in direct contact with the outside air through the high water tank.

The main reason is that the two methods of constant pressure are different.

The former uses a low-position constant pressure tank for constant pressure.

The open system maintains constant pressure through a high-level water tank.

As for public baths, high pressure must be used. I have never been exposed to this.

You can ask the relevant designers.

Also: If the floor is too high, avoid excessive pressure at the low end of the system and use a closed system.

The investment in an open system is much less.

It is estimated that an open system is required for economic reasons, and the height of the public bathhouse will not be very high.