CarboAir 150 Inline Carbon FilterCarboAir 150 Inline Carbon Filter Mid Duct Odour Control A clever inline carbon filter that can sit in the middle of your ventilation run, not just at the end. Unlike traditional carbon filters that must be installed at the start of the duct, the CarboAir 150 works like an inline air cooled reflector giving you flexibility to position odour control wherever your tent layout allows. Why growers choose the CarboAir Inline Filter: Inline installation