Q: Select duct sizes for the rectangular duct system shown in theFigure, using the equal friction method. The total pressure availablefor the duct system is 0.12 in. wg (30 Pa), and the loss in total pressurefor each diffuser at the specified flow rate is 0.02 in. wg (5 Pa).Assume the velocity in mean duct 600 fpm.,150 cfm25 ft (8 m)(0.071 m/s)PlenumBoots are round5 ftto rectangular.20 ft (6 m)15 ft (4.6 m) (1.5 m)(1.5 m) 4n200 cfm5 ft(0.095 m/s)150 cfm5 ft(0.071 ms(1.5 m)5 ftE (1.5 m)5.(1.5 m)5 ft

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