Harvest Time: Need help containing "fragrance"

I'm about a week from harvest and I've noticed some "fragrance" outside. I have a large carbon filter hooked up to an exhaust fan that is sealed and pumped outside. Someone came over that has no idea about my greenhouse project and said "Dude, I can really smell weed by your garage." I played it off to them but it really has me concerned. If the air is going through the filter and being pumped outside should anyone be able to smell it at all or should it be undetectable? Also are there air freshener products I can use to cut down on the smell in the flowering room before it gets pumped out through the filter? HELP!

I use a carbon filter as well as an ozone generator, tho OZN-1, that gets rid of any left over odor, even during harvest time.

I used some citrus ozone blocks in my grow room. Helped out a little.

Thanks! You guys rock! I will definitely invest in the ozone generator.

Man i hate when that happens, gets me parra.

you might also want to consider switching up strains for some that aren't as pungent.