it's been a while since i've posted on this site...but I have a question... my bud is very stinky and i was wondering if i can exhaust between the drywall instead of my attic?
You can but it will still reek. You need to filter it through some charcoal. I could not afford a regular charcoal filter. So I bought loose actvated charcoal and made my own. Good Luck!
Why would that help with smell? It will still leak out where ever it can. Stick an ozone generator http://www.plantlightinghydroponics.com/cap-ozn1-ozone-generator-up-to-5500-sq-ft-p-632.html in your attic that will kill whatever smell from the air that goes up there. If you went into your drywall you would probably loose cfm from your fan because the air needs to be able to dissipate