Air Intake?

[Growda]

Hello, I've got a 440cfm vortex (6inch) pulling air out of my flower cab. So i have a 6" hole for the exhaust out of the cab but I have 5 X 2" PVCs for the intake (completely passive). The Vortex is on a speed control, I'm running at about 2/3 power.

Is this enough (i'm beginning to think it's not)?
How much intake should I have?

Thanks for any advice.

Growda

 

[SEEDYNONO]

you should have 3x the size or your exhaust exit hole for intake..

i use (4) 8x8 inch darkroom louvres on my cab with my 6in vortex

 

[Growda]

So I would need 9 X 2" holes then?

 

[axel neek]

Three 2" holes are not equal to one 6" hole.

 

[SEEDYNONO]

you need to do some math and find out the actual surface area of these circles and use that in your calculations because axel is right..

circles aren't like squares..

 

[Growda]

Thanks guys, to be honest I can't imagine what I was thinking but once the fog lifted it was all very simple. As a note to anyone using the search tool in the future who might stumble across this thread....

pi(r)squared...

not a revolutionary baking dish

Growda