=+11-20.

Consider a room with a 20 ft exposed wall that has two windows. The other dimension is 42 ft

(12.8 m). The room is part of a variable air-volume system.

(a) Lay out and select T-bar diffuser from Table 11-6 if the room requires a total air quantity of 800 cfm (380 L/s) and the maximum total pressure available is 0.10 in. wg (25 Pa).

(b) Note the total pressure, the throw to where the maximum velocity has decreased to 100 ft/min (0.5 m/s), and the NC for each diffuser.