Traditional Culture Encyclopedia - Hotel reservation - Can the sewage gas pipeline in the bathroom on the second floor of the hotel go out from the first floor side?

Can the sewage gas pipeline in the bathroom on the second floor of the hotel go out from the first floor side?

The exhaust pipe of the bathroom is on the outside of the building.

This must extend out of the wall, but it doesn't have to. In many cases, it is enough to extend 5cm out of the wall, mainly for the sake of smoother exhaust of the exhaust pipe, otherwise the exhaust pipe is too short, which may cause the exhaust pipe to sink into the room and cause unobstructed problems.

Usually, the area of the ventilation opening in the living room is required to be not less than one tenth of the building area of the room.