If your carbon filter is designed to pull air thru and out, then you should operate it this way. Pushing air thru a filter that is designed to suck air will greatly shorten the life span of the filter itself.

Either way, as long as the top heat is removed you are fine. The air that comes out, if you unit is located at the top should be vented out and away from the grow area.

It will remove the higher levels of air heat and you need not screw with air cooled reflectors unless you are running dual 1000 watt lights.

a 1000W light with a fan on it does wonders...no need for special stuff...you can still get within 12" of the canopy.

Which is plenty.

But follow the designed air flow your carbon filter was built for.
HARDDON Reviewed by HARDDON on . Ventilation Question Ventilation question I need answering, two potential setups, which one would work better? 1) Carbon filter at the top of the room, connected directly to an extraction fan. Fan sucking air through the filter, blowing air through ducting into an air cooled reflector, ducting connecting the adjacent end of the reflector taking air out of the grow room. 2) Carbon filter at top of the room, filter connected directly to ducting, ducting connected to air cooled reflector, adjacent end of Rating: 5