http://boards.cannabis.com/showthread.php?t=91905

But either way if your going to be using a carbon filter get an inline vortex or something, the blowers are week on static pressure. they dont lose much when using venting but they do on the filters
JackdaWack Reviewed by JackdaWack on . CFM backpressure i was reading this on another thread fans are tested without ducting which give them the cfm. The thread also mention that if you use ducting, it will cut the cfm by half. No one on that thread asked if it will cut more than half if ducting and carbon filter is use. It got me thinking since i just upgraded and i need a fan that will cool 2000watt in a 64 cubic feet room. Any input on this would be great. thanks in advance Rating: 5