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Class W*H*D(mm) Airflow(m³/h) Initial resistance Final resistance
G3 595*595*20 1900 35Pa 180Pa
G3 290*595*20 1000
G3 595*595*46 3400
G3 290*595*46 1700 45Pa 220Pa
G4 595*595*25 1900
G4 290*595*25 1000
G4 595*595*46 3400
G4 290*595*46 1700