PureFilter Activated Carbon Filter Ø150mm - 900 m³/h

PureFilter Activated Carbon Filter Ø150mm - 900 m³/h: clean air at the heart of your indoor grow

Control the smell and you control the grow. The PureFilter Ø150mm activated carbon filter is the component that turns a plain extraction setup into a genuine air-treatment system. Rated for airflow up to 900 m³/h and loaded with 4mm granular activated carbon, it neutralises the volatile organic compounds behind grow-room odour before they ever leave your tent. At BloomLED, the French growshop that has lived and breathed LED horticultural lighting and indoor growing for more than 10 years, every filter we stock is judged on the balance of performance, pressure drop and service life — not on spec-sheet numbers alone.

Why 4mm granular carbon makes the difference

Not all carbon beds are equal. Grain size arbitrates between two competing variables: available adsorption surface and resistance to airflow. Carbon that is too fine offers enormous surface area but chokes the fan; carbon that is too coarse lets air — and the odour molecules riding on it — slip straight through. The 4mm grain used in the PureFilter is the compromise most experienced indoor growers settle on: long enough dwell time between loaded air and active material, with a pressure drop that a 600 to 900 m³/h inline fan can handle comfortably.

In practice, incoming air first passes the fabric pre-filter, which catches dust, particles and plant debris. It then travels radially into the carbon bed, where volatile organic compounds — terpenes, esters, aldehydes — are captured by physical adsorption on the surface of the micropores. Scrubbed of its olfactory signature, the air exits through the central core and is carried away by your Ø150mm ducting.

Sizing, installation and maintenance

Size it properly. The golden rule: your fan's rated airflow must stay at or below the filter's maximum. This PureFilter Ø150 — 900 m³/h comfortably covers inline fans from 600 to 890 m³/h. A more powerful fan would shorten contact time with the carbon and let odour through; an underpowered one would fail to refresh the air in your grow tent often enough.

Fit it correctly. Mount the filter inside the grow room, upstream of the fan, so loaded air is scrubbed before it reaches the impeller — which also protects the fan itself. Hang it from ratchet straps so no weight bears on the ducting, then clamp the outlet to the fan with a jubilee clip. Check every joint for leaks: a single unfiltered air path cancels out the whole filter.

Maintain it. Rinse the pre-filter under clean water every four to six weeks and let it dry fully before refitting. Never wash the carbon itself: moisture saturates the micropores and destroys adsorption capacity for good. Under typical use — 12 to 18 hours a day, relative humidity held between 40 and 60% — expect 12 to 18 months before replacement. The end-of-life signal is simple: a noticeable smell at the duct outlet, or a clear drop in airflow.