104 / 416
MULTIFLOW SERIES
DUCT MOUNTED FANS
B
© FANTECH
2016
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.
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
21 23 21 16 13 14 9 1
Outlet Side
19 20 19 10 16 12 8 0
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
21 22 22 17 14 13 8 6
Outlet Side
21 20 20 19 16 12 8 0
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
18 14 18 13 15 15 11 3
Outlet Side
17 13 17 16 17 13 10 2
Frequency, Hz
63 125 250 500 1k 2k 4k 8k
Inlet Side
19 19 18 16 13 15 10 4
Outlet Side
15 10 16 16 17 13 9 2
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
In-Duct Spectrum Corrections, dB*
PERFORMANCE CURVES
B-44