My light period is throughout the day, so I leave the grow box open to the pretty small working space that I have. Youâ??ll have to buy another fan to do it my way, but then the stink filter speed and the exhaust fan speed can be controlled individually.

[attachment=o251022]Pic

Hope that helps,
HMR
Horsemanrocks Reviewed by Horsemanrocks on . Carbon filter and odor control questions Couple of questions about carbon filter and effectiveness for odor control and placement of the filter to my box fan. I bought a pretty good quality (I hope) carbon filter for odor control and reading the instructions it say place the filter as close to the fan outlet as possible. My questions are: 1) I have this fan hooked up to my 600 watt light and need the air to flow out of the room to keep my temp under control. If I hook up my carbon filter up to the end of the fan (pic with red Rating: 5