Witch fan to get?

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TomTomMj

Member
Howdy!
My space is 2x4x5 I would perfer not to use a speed controller.
I want to run a fan with a carbon filter. what cfm rating fan should I aim for based on my room size?
 
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TomTomMj

Member
Growdict said:
Also a 170 will work
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Thank you, may I ask what the difference would be with the 170 compared to the 190.
The reason I'm asking about the 190. 2x4x5= 40x3.5=140 cfm req.

190 cfm fan with carbon filter I'm told will bring it down by 25%-->
Now the fan will push 142.5cfm with the filter attached. Am I right or have I done anything wrong?
 
Growdict

Growdict

Well-Known Member
it is just a general guideline. either will work just fine. if you have a hotter light you are using, like a 400-600w hps, go with the higher one. if using less than 400w of cob led, smaller one will be fine, IMO
 
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TomTomMj

Member
I'm running a 300 watt led, I was afraid the 190cfm could possibly cause too much negative air pressure, but I am assuming it would work better for the smell since its pulling at a faster rate
 
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