Co2 is heavier than air and will fill a room. Yes you don't need it at night but you must be very carefull in living areas. You will not know it's too late. For this reason it is not used around living areas and must have good ventilation.

My lights are on at night so no Co2 near living quarters.
LOC NAR on probation Reviewed by LOC NAR on probation on . Co2 and bedroom? I just got a co2 system and my grow setup is in my bedroom about 10 feet from where i sleep. My mattress is on the floor and the grow setup is in the closet which the door is open. Is it safe to run co2 right where im sleeping? are there any dangers or things I should worry about? Any tips or advice for this setup? I dont really want to ruin the closet door by cutting room for vents etc I want to either make this work the way my setup is or not use it. Any help would be great. Rating: 5