Ok so I'm a seasoned outdoor farmer. And I'm moving within the month to a house without a secure outdoor area. I'm trying to build a completely odor controlled grow box from the ground up. My main concern is that i don't understand enough about ventilation systems, intake fans? Intake filters? Carbon filter set up? I want a completely discrete box without any odor escaping. So I guess my main question is with a carbon filter sucking air out do I have to worry about scent escaping an intake hole? I'm sure somewhere I could find a post answering my questions sorry but I'm new here. Thanks
You need an extractor fan with a cfm of at least 1/5th the volume of your grow area and a carbon filter. Filter goes inside the grow area, then the fan pulls air through to the outside. As long as it is relatively airtight this will create negative pressure and you don't need to worry about smell escaping through small gaps.