Ventilation - Is 140 m3 to much/little for my grow box?

Coffeeholic

Well-Known Member
Hi folks.

I'm planning my grow box and need to figure out the ventilation.

I'm thinking passive intake and a 140 m3 fan through a scrubber for exhaust.

My grow box is 45 x 75 x 120 cm (17,7 x 29,5 x 47 in).

So, i wonder if this fan will do?

Thanks :)
 
figured it out..

So, this is about 14.6 cubic feet.

Air needs to be changed every 3 minutes, so a 5 cfm fan could actually be sufficient.

My 82 cfm fan will be more than enough.

I'm gonna add some co2 and a carbon scrubber, plus the lights. I'm adding 30% for all of this and it's still plenty.
 
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