filter fan cooltube design

hi guys what is the best way top or bottom for
attic grow room.
the room is in the shape of an triangle. 2m x 2m

#2 but move fan to right so its pulling air from filter thru lights into blower and out

Agree with Snaps. Unless you're worried about the temps from the lights hurting your fan. In that case, leave it how you have it.

Mount carbon filter up high to get warmer air.

Put passive intake down lower.

Use a hepa filter on active intake blowers.