Activated carbon filters are used in the duct ventilation and air conditioning for separation of gaseous pollutants. (Odors, etc., for this purpose, please read our noxious gas Table) The channel filter frame for pocket filter / cartridge filter and front frame for the activated carbon cartridges are firmly mounted and sealed. By default, the activated carbon cartridges ACP 145/450 are installed. The channel is on both sides (required size specification // individually) with a centered plug socket equipped. The inspection door for opening the channel filter in filter change is sealed with M6 star knob screw. To ensure a smooth workflow, we recommend that you always have a bag filter / filter cartridge in stock.