Crazy Horse
Well-Known Member
- Joined
- Nov 18, 2006
- Messages
- 800
- Reaction score
- 256
How does a closed environment work? If u are not venting air out, where does the used up air go? I like the idea, but don't get how it works. The reason I am asking is because I am thinking of running co2 for my future grows. So what other ways do u run co2? Do u have to run the exhaust fan on a timer, and shut the exhaust fan off when the co2 kicks in, and have it kick in a certain time later? I am still researching, so any info would help. CH