Fan direction..

Ive made a very ghetto carbon filter, it seems to work but at certain times the smell is stronger, and other times it is non-existed. Which i dont understand. But anyway is it better to have the fan blowing into the filter or blowing out of the filter. Forcing air through the filter or pulling air throught it if that makes sense.

face it twords the filter

Ok that is how it is now. Does smell rise like heat? So keeping it higher will be more effective? lol

I don't think it will make any difference which way the air flows.

Makes a big difference how air flows... Put it in this order... Growbox fan and then filter.. Make the fan suck out air from the grow area and exhaust into and out of the filter the air exiting will go through the filter and be scrubbed. Putting a fan before the filter won't work

also the fan flow is a stronger force pushing through the filter instead of sucking air througn it

fan then filter, go buy yourself an air sock, worth the money for shhure!! it will smell like heat because the room is hot, better that reeking like a dead skunk.