Acraflow Acoustic Louvres - 400/600 Series
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Noise Reduction (dB)
Hertz
125
250
500
1000
2000
4000
Series 400
15
20
25
27
30
30
Series 600/20
15
20
32
37
32
32
Series 600/16   16 22 27 34 36 33
   

 
 

Test Specimen nominal size 900W x 2400H
Air Pressure Drop (APD) graphs are for standard blade spacing.
For applications where APD is critical please consult Acran.
All tests conducted in accordance with AS 1191-1976
Noise Reduction = Transmission Loss + 6dB (Across all frequencies)
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