You might wanna give the DIY carbon filter a try though, and get a cheap inline fan and some ducting, it's an investment and it is well worth it. I have a sticky somewhere on it, you should look in to it. And don't get a high CFM fan for this, 160 should do just fine, the only true way to get rid of the odor is to use a carbon filter, everything else is just masking the smell which is kinda counter productive.

Give it some thought.

Here's the link, just take a look, don't write it off until you give it a shot, you will be pleased! Charbud knows what he's talking about!

http://boards.cannabis.com/growroom-...effective.html