Air Distribution

Supply air (SA)

In the diagram next to this text, the SA is marked in red. The supply air is blown down from the AHU, into the duct well on the left side, where the duct is divided into 3 branches. The first branch, which is responsible for all restrooms and the second floor corridor, originates at the top of the second floor, and distributes air to corridor and restroom from the ceiling. At the point before entering the restroom, it generates a sub branch which goes down to the first floor ceiling level, and distributes air to the restrooms.

The second branch starts at the floor level on the second floor, and distributes air directly into the under-floor space, which is utilized as a plenum chamber. Then the air goes through fan units at different positions, and serves occupants there.

The 3rd branch begins at the first floor's under-floor level, and distributes air in a manner similar to the second floor. The system can hence be distinctly divided into ceiling level supply and under-floor supply.