I have a 600wt hps light with an air cooled hood so I bring the fresh air into the light and a fan sucking the the hot air from the light. When I notice the smell coming out of the flower room I place a home made carbon filter in there and its stops the smell coming out until when they really start kicking in around the 5th and 6th week and then I have a scubber outside the room along with a couple of other things a mister and a can of skunk(order remover). If you were to just place a same carbon scrubber in your veg room it should take care of it as long is the door is shut. On my filter I use a $25 inline fan bought at hardware stores.


Bobbie