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MULTIFLOW SERIES
© FANTECH
2016
B
DUCT MOUNTED FANS
B-45
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
23 21 21 18 16 12 7 -1
Outlet Side
20 19 18 20 16 11 5 -4
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
22 22 23 17 15 12 7 -1
Outlet Side
21 19 18 19 15 11 6 -3
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
21 20 18 16 15 14 9 1
Outlet Side
19 17 15 18 16 13 8 -1
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
22 21 19 16 15 13 9 -1
Outlet Side
20 19 17 19 16 13 8 -1
The noise values shown in the graphs are mean dB(A) levels at 3 metres in free field conditions based on spherical radiation.
* In-duct Sound Power Levels across the spectrum can be determined by adding the In-Duct Spectrum Corrections to the
appropriate dB(A) level determined from the graph. The figures in the box
are correction factors to apply to the dB(A) figure for
the Inlet or Outlet Side.
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
PERFORMANCE CURVES