how many weeks in are you though? different strains start smelling at different times. my babes are only 3 weeks old and they are STINKY :\ and im using a carbon filter, you have to make sure that the pcs are pretty much air tight around the fans and exhausts if your gonna use a carbon filter, or you get a very stinky house.
Good start on your grow buddy, im growing in 2 pcs cases myself, but if i were you id veg for at least 3 weeks, its not that much longer and you get a massive spurt of growth between week 2-3 (well you do in my strain anyway, lots of things are strain dependant) but most auto flowerings to my knowledge start to flower at about 3 weeks so if you start flowering before that point your not gonna get much yeild. IMO.
thought about SCRoGging?