AIR FILTRATION DEVICE AND METHOD

摘要

An air filtration device for filtering contaminated air in a room that is accessible to persons, which device comprises a housing provided with an air inlet and an air outlet, as well as air moving means for moving air from the air inlet to the air outlet in a direction through a filter element, characterised in that the air filtration device operates according to the displacement principle, wherein the capacity of the air filtration device has been selected so that contaminated air present in the room is circulated X times per hour through the filter element, said value X ranging between 25 and 88, in particular between 40 and 65, more in particular at least substantially equalling 60.