Well,

How long do you run your filter? I kick it in after I start smelling bud in the area about two weeks or so into flowering. Since the bud is stanking 24 hours a day thats how long I run the filter. The purpose of the filter is to prevent the smell from tipping others off. Your security is the highest priority so don't be cheap on this issue. It only takes a few seconds for someone to smell your weed and a minute to call the law.

Loco

P.S. Try the Manage Attachments button.