Phat Filter 24 x 8 in Carbon Filter | 600 CFM, Virgin Carbon, Pre-Filter

How the Phat Filter Strips Odour from Room Air

This is a cylindrical activated carbon filter, 24 in long with an 8 in outlet, rated at 600 CFM. The bed is low-density virgin carbon that is steam activated and kept as granules rather than pressed into pellets. No glues or binders hold it together, so more of each granule's surface is open to the air passing through. The granules are packed tightly, which keeps the bed even and porous. Air enters through an outer aluminium mesh with 53% open area, which keeps resistance low across the whole length. Inside, a conical base spreads the draw evenly from top to bottom instead of pulling hardest near the outlet. The ends are sealed so air cannot slip past the bed unfiltered. Each filter is sealed right after manufacture to hold its moisture until it goes into service. A white Dacron pre-filter slides over the mesh and is held by two elastic bands. It traps dust and lint before they can coat the carbon.

Sizing an 8 Inch Carbon Filter Into the Exhaust

An 8 inch carbon filter like this belongs at the start of the exhaust line, hung high where the warmest, smelliest air collects. Most growers pull air through it with an inline fan of matching duct size, rather than pushing air into it. Match the fan to the filter, because a fan that badly outruns the carbon moves air faster than the bed can scrub it. Static pressure from duct bends and a long run also cuts real airflow, so keep the duct short and straight where possible. In a sealed room it can run as a recirculating scrubber, cleaning air without venting outside. Wash or replace the pre-filter whenever it greys over, since a clogged sleeve starves the carbon. High humidity shortens carbon life, so keep the room within a sensible range during late flower. When odour starts slipping through despite steady airflow, the bed is spent and the filter needs replacing. Store spares in their sealed wrap until they are needed. Treated that way, it keeps the smell inside the tent instead of in the hallway.

Key Features

• 600 CFM rating: Suits tents and mid-size rooms on an 8 in exhaust line.
• Virgin steam-activated carbon: Binder-free granules leave more surface open to the air.
• 53% open aluminium mesh: Low airflow resistance along the full length of the filter.
• Conical internal base: Spreads the draw evenly so the whole bed does the work.
• Dacron pre-filter included: Catches dust and lint before they load up the carbon.

Technical Specifications