growbox ventilation

hey guys, i'm a newbie so don't go too nuts over my silly question! i've been looking around but can't find the answer i'm looking for. i'm growing in a small closet currently with 2x42w cfls at the moment and will add 2 more 42wcfls soon (only just germinated the seeds). i dont have any ventilation currently, except when i open the closet to look at the plants. i'm really trying to not tear large holes in my closet for exhausts and don't fancy the electrical work. is putting some small ventilation holes in the closet and placing a desk fan in the grow box going to be adequate? where should i place the fan? ventilation holes? i'm only growing lowryder. hope you can help fellas.

For a short while it will help, but long term, thru flower, have my doubts. Or, just keep her real small. The problem with that, as a grower, if I cant harvest enough herb to last from grow to grow, then I sized it to small, for me anyway.

IMHO, a grow, should give you enough dried packed away bud, cycle to cycle. A small place to get a clone or 2 going for your next cycle.

I use a box,(for personal) 150 HPS paired witha 70 MH, I get 3+ ounces every cycle, we smoke into 2 of those zips, and the rest makes killer presents for birthdays, ect.

bedroom sliding door closet, or walk in standard door?
can you keep a window open nearby? does your closet door have a doorknob? is it a security problem to remove doorknob for vent hole?