Reply To: The importance of good air circulation

[Somatek]

Solid info and the only thing I had to add was always remember that rated CFM and actual CFM are different as ducting (especially bends), filters and such all reduce the CFM’s.  Generally with tents it doesn’t matter but when calculating the air exchange needed for rooms it gets more complex.  The more resistance on the fan, the lower it’s actual CFM before being reduced by other factors.  Which is why fans should always go on the end of the exhaust system, sucking air through ducting instead of trying to blow it through which drastically reduces CFM.