CarboAir Inline 250x740mm is an inline carbon filter from CarboAir designed to sit in a duct run, typically on the extraction side. Its steel outer body helps dampen fan and duct noise, while a thick bed of virgin activated carbon granules adsorbs odour‑causing VOCs. The 250 mm diameter, 740 mm length model is rated up to 1250 m³/h and ships with hanging brackets. Unlike traditional can‑style filters, this inline unit can be mounted outside or inside the grow area, saving internal space and simplifying closed‑loop setups. No pre‑filter sleeve is required on this series. For optimal results, pair the 250 mm unit with matching ducting and an extractor fan whose output does not exceed the filter’s stated airflow capacity.