From a fellow grower: What is the best air purifier that removes the noticeable aroma of growing? I only grow for personal use (4 plant tent).
Something with a carbon filter
Phresh Filter 6 in x 24 in 550 CFM Amazon.com
AC Infinity CLOUDLINE T6, Quiet 6" Inline Duct Fan with Temperature Humidity Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics Amazon.com
I second phresh filters, they work great!