Refer to the residential duct system. Based on CFM requirement for rooms 1,2,5 and .1″ friction loss per 100`, what size round trunk duct should be installed for these rooms. If sizing results are between sizes use next larger size to avoid noise from higher velocities:

Refer to the residential duct system. Based on CFM requirement for rooms 1,2,5 and .1″ friction loss per 100`, what size round trunk duct should be installed for these rooms. If sizing results are between sizes use next larger size to avoid noise from higher velocities: