This is what I don't understand. You said you were running a sealed room, but then you talk about exhausting the room through a carbon filter. At first, I assumed that you were going to have a sealed room and you would have air-cooled lights where the intake is coming from outside of the tent, going through the lights and cooling them, then being exhausted outside the tent, but in that case you would not need a carbon filter because none of the air inside the tent would be getting exhausted. A sealed room would mean you need CO2 generation of some sort, with no intakes or outtakes for the actual air inside the tent. In the case of a sealed room, you would only need intakes and exhausts for the air-cooled lights, and that air should not come in contact with the air inside the tent. With a sealed room you wouldn't need the carbon filter. So, which is it?