Active Air Carbon Filter 12 x 39 in. 1700 CFM, Australian Virgin Carbon

What the Active Air Carbon Filter 12 x 39 Is Built For This heavy-duty carbon filter is made for 12 in exhaust and large commercial grow rooms. It runs 39 in long on a 12 in attached flange and is rated at 1700 CFM. A 1.8 in bed of virgin activated carbon from Australia is machine packed through the whole cylinder. The carbon adsorbs odour-carrying volatile compounds, holding them on its porous surface. Powder-coated aluminium tops and bases keep the frame stiff enough to hang horizontally without sagging in the middle. It comes with two pre-filters, so one can dry while the other is in service. Expected life is up to two years, depending on humidity and runtime. Boxed, it measures 17.1 x 17.1 x 40.9 in and ships at about 61 lb. That weight calls for solid anchors, rated straps and a two-person lift. The flange mates directly with 12 in duct and fan collars. Setting Up a 12 Inch Carbon Filter in a Commercial Room A 12 inch carbon filter at this size suits large flower rooms, warehouse bays and stand-alone scrubber stations. Pair it with a fan of the same duct size at or below the filter's rating, controlled so speed can follow the odour load. Mount it horizontally on a rack or hang it from two rated points near the ceiling. Pull air through the carbon toward the fan to keep the motor clean. Keep duct runs short, since big fans lose a surprising share of airflow to long runs and tight elbows. Rotate the two pre-filters, rinsing one while the other works, and never refit a damp sleeve. Hold humidity in a sensible band during late flower to protect the carbon. When odour slips through at steady airflow, the bed is spent and the whole unit needs replacing. Changing it out is a planned job, not a quick swap, so schedule it between runs. Set up properly, it gives a commercial room the scrubbing capacity it needs. Label the install date on the flange so the replacement is planned, not rushed. Key Features 1700 CFM rating: Matches 12 in fans in commercial rooms and scrubbers. 12 in attached flange: Connects directly to standard 12 in duct and fan collars. 1.8 in virgin carbon bed: Machine-packed Australian granular carbon throughout. Two pre-filters included: Rotate sleeves so one dries while the other works. Up to 2 years of life: Long service with good humidity control. Technical Specifications Specification Value Brand Active Air Part number ACCF3912 Size 12 x 39 in Airflow rating 1700 CFM Carbon Virgin activated Australian granular carbon Carbon bed depth 1.8 in Pre-filter 2 included Flange Attached Tops and bases Powder-coated aluminium Dimensions (each) 17.1 x 17.1 x 40.9 in Shipping weight 60.85 lb Life expectancy Up to 2 years, depending on conditions UPC 638104016353