What should be used for vent a 69"x25"x18".

And how would I figure out the sq foot of this box?

Would a 500cfs exhaust fan be to much?

I have a choice of 40 cfs, 160 cfs, 210 cfs, and the 500 cfs. What would be recommended?

Pudder
pudder Reviewed by pudder on . Ventilation What should be used for vent a 69"x25"x18". And how would I figure out the sq foot of this box? Would a 500cfs exhaust fan be to much? I have a choice of 40 cfs, 160 cfs, 210 cfs, and the 500 cfs. What would be recommended? Pudder Rating: 5