As per ASHRAE Fundamentals 2009 Chapter 21 Table 8, the design "face" velocities for determining the louvre size is 2m/s for Intake and 2.5m/s for exhaust. Can anyone clarify how to use these velocity values in sizing the louvres?
For example, if 5000 CMH (1.39 m3/s) of air has to be exhausted...