SOLVED: A simple low-velocity duct system (max velocity = 1000 ft/min) is shown below. Size an appropriate circular air duct system if the plenum can provide 0.2 in. wg of static pressure. A diffuser will be installed at the end of each branch that is rated for 0.05 in. wg at the exit. Use the attached chart to design the duct system.40 ft200 cfm20 ftplenum35 ft20 ft40 ft300 cfm30 ftSpecifications: The working fluid is air, there are two 90° elbows on the bottom branch and one elbow on the top
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