best carbon filter?

Will be setting up my new one, want it smell-proof. Will be about a 10x15 foot sized room. Growing two systems of 9 plants, so they wont all be at the same stages. I am going to seal the room. But I am looking for the best way to smell-proof the room, especially making sure the smell doesnt leave the room.

We are doing Co2 along with the O-zoninator Junior o-zone maker. Willing to spend the money as long as it fits the bill.


thanks!