Zosefera mabokosi amagwiritsidwa ntchito kusefera mpweya mu mpweya wabwino ndi air conditioning systems.Mabokosi osefera a in-line duct ali ndi zovundikira zosavuta kutsegulira zokhala ndi timapepala tosavuta kutulutsa mwachangu, zomwe zimathandiza kusintha mwachangu komanso kosavuta kwa zinthu zosefera.Mabokosi athu amtundu wa ducting filter amapezeka kuti agwirizane ndi kukula kwa ducting kuchokera ku 100mm mpaka 200mm diameter.Hepa fyuluta Imatsekereza bwino mabakiteriya oposa 96%.