Properly sized and with the correct airflow carbon filters are very effective. Small grows can just use ono or an air ionizer can help a great deal. If it's REALLY stinky, use them all at once! Those little plugin air fresheners will work if you get the right scent. Mines so small I can just use Fabreeze! LOL! I don't use anything unless the rare visitor shows up cuz I LOVE that smell!

You know for sure your a head when you drive down the road and smell a dead skunk and think it smells good! LMAO!