Carbon Filter placement

Hi, I have a small grow box (1'x1.5'x2.5'ish) and I,m on my first grow. Its a small box and I'd like to start a second plant. Would it be OK to place my carbon filter at the end of line (and blow the air through) or would I be better off leaving it in the box, security being important to me

Suck air, not blow through filters.

Thats what I tunk, only one plant for me so

Leave it in the box. Hang it with some bungee cords from the top and suck air through it--exhaust. Heat rises

Just testing it outside the box at the moment to see what temps are like. The box is very small and its a pain in the ass to get the plant out to water it. No room to hang it either i'm afraid. Plant is currrently 8 days old so no smell yet, just want to see what effect it has on temps. Probably be able to keep 2 plants in there too 4 weeks apart, only doing autos so on 24/7

if you want the filer outside then you need your fan outside too sucking air through the filter

fan - filter - duct at the top of your growing space