Answer / hameedwahab

Duct Cross section Area (in Sq.Feet) X Velocity (Feet/min).

Answer / md ashwaq

To calculate CFM of Fan
1) check the supply tonnage of the space..
For Example : If u have a room which needs 1.5 TR of
cooling by design...
then take 1 TR = 400 CFM.
For 1.5 tr = 600 CFM.

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