=+12-35. The duct system shown in Fig. 12-36 is one branch of a complete air-distribution system. The system is a perimeter type located below the floor. The diffuser boots turn up 90 degrees. Size the various sections of the system, using the equal-friction method and round pipe. A total pres-

sure of 0.13 in. wg is available at the plenum. Compute the actual loss in total pressure for each run, assuming that the proper amount of air is flowing.