=+11-21. Consider a 18 x 30 ft (5.5 x 9 m) room in the southwest corner of a zone. There are windows on both exterior walls, and the peak air quantity for the room is 1000 cfm (470 L/s).

(a) Lay out and select T-bar diffusers from Table 11-6 using a maximum total pressure of 0.15 in. wg

(38 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.