leakage, external
[EN 13141-4:2021, 3.11]:[EN 13141-7:2021, 3.1]:leakage to or from the air flowing inside the casing of the ventilation unit to or from the surrounding air.
[EN 13141-4:2021, 3.11]:[EN 13141-7:2021, 3.1]:leakage to or from the air flowing inside the casing of the ventilation unit to or from the surrounding air.