Keep the air in your growing area clean, fresh and odor free with a carbon filter. Your plants will love it. The Can 50 carbon filter will clean the air up to a 16'x16'x8' room as a a recirculating air filtering system when a 6" 400 CFM fan is attached to it. Use it as a filter to clean air as you exhaust it, you can vent up to a 10'x10'x8' room through it when using a 300 CFM fan with it. It measures 19.7" in height, 16.5" in diameter with a total weight of 55 lbs of which 42lbs are activated carbon with a 2" thickness of the carbon. Minimum air flow recommended is 210 CFM. Every filter has a "pre-filter" on it to catch dust and dirt particles, helping to extend the life of the filter. Flange for connecting to fan or ducting is sold separately.