[EN 13141-7:2021, 3.7]:air volume flow corresponding to the maximum achievable fan curve setting of the unit at the pressure pqvmax, either declared or measured.Note 1 to entry: To determine maximum air volume flow, see 7.2.2.2, Table 9.Note 2 to entry: If the supply and exhaust air volume flows are different, then the maximum air volume flow is equal to the smaller of the two air volume flows.[SOURCE: EN 13141-4:2021, 3.7, modified – Note 2 to entry has been added]