[EN 13141-7:2021, 3.12]:pressure increase induced by the ventilation unit given as difference between the static pressures at the unit outlet and the unit inlet.Note 1 to entry: The external static pressure difference is used to determine the maximum air volume flow, the reference air volume flow and the minimum air volume flow.[SOURCE: EN 13141-4:2021, 3.3, modified – “and the minimum air volume flow” has been added in Note 1]