Active Air Carbon Filter 4 x 14 in | 215 CFM, Australian Virgin Carbon

Inside the Active Air Carbon Filter 4 x 14

This compact carbon filter is built for spaces where every inch of headroom counts. It stands 14 in long with a 4 in attached flange and is rated for 215 CFM. The bed is 1.8 in of virgin activated carbon from Australia, machine packed so it settles evenly. That carbon adsorbs volatile organic compounds, holding odour molecules on its porous surface as air passes through. Powder-coated aluminium tops and bases keep the cylinder light and rigid. A fabric pre-filter slips over the outside and catches dust before it reaches the carbon. In a typical tent, the filter lasts up to two years, depending on humidity and how long the fan runs. Boxed, it measures about 9.1 x 9.1 x 15.9 in and ships at roughly 9 lb. It hangs from a tent bar with straps. Compact as it is, it carries the full 1.8 in bed depth.

Pairing a 4 Inch Carbon Filter With a Small Fan

A 4 inch carbon filter belongs in a closet grow, a 2 x 2 or a 2 x 4 tent, where a small fan already handles the heat. Choose an inline fan that moves no more air than the filter's rating, so the air slows down enough for the carbon to work. Hang it at the top of the tent, where warm, scented air collects, and pull air through it toward the fan. Keep the duct run short, because every bend steals airflow from a fan this size. Rinse the pre-filter whenever it looks grey and let it dry completely before putting it back. High humidity in late flower wears carbon out faster, so a dehumidifier pays for itself twice. When smell starts leaking out with the fan running normally, the bed is spent. That is the signal to replace the whole unit rather than trying to recharge it. It is a scrubber sized for small spaces and the fans that serve them. In the right tent, it runs quietly in the background and asks for little attention beyond a pre-filter rinse now and then.

Key Features

• 215 CFM rating: Matches compact inline fans in closets and small tents.
• 1.8 in carbon bed: Virgin Australian granular carbon gives full contact time.
• Pre-filter included: Catches dust before it loads up the carbon.
• Lightweight build: Powder-coated aluminium ends keep it easy to hang.
• Up to 2 years of life: Long service in a typical small grow.

Technical Specifications