PS - you're probably past this by now possibly, but, if you have $50 to spare, I would highly recommend this plug-in Ionizer - it'll blow out the smell of a couple of small plants with ease, and you can adjust its output on the fly, it has literally saved my ability to grow in a small condo/apt closet so far. Just read the reviews for it. It covers pretty much my entire place on a lower setting, running in the closet continuously - so the smell doesn't even get out of the closet before its covered-up. I've found the ONA type stuff to be spotty at best, and the carbon air filters I slap on the PC vents don't do much of anything (they especially don't help when I open the boxes a few times a day when lights are on).
GT50 Professional-Grade Plug-In Adjustable Ionic Air Purifier
http://www.amazon.com/Professional-...CW9W/ref=sr_1_2?ie=UTF8&qid=1331086620&sr=8-2