Even though co2 is heavier than air if you have a draw(vacuum) it will get moved towards it.
socialistpete Reviewed by socialistpete on . Co2 Question Okay basically i have a questions that hopefully someone can answer. I am running 2 grow tents in a sealed room with aircooled hoods that are hooked up like this: carbon filter --- > hood --- > fan --- > the air is exhausted out through the top of the tent back into the room. The fans are 530 m3/h (one per tent). I am not using an intake fan, its passive. Rating: 5