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P-13
© FANTECH
2016
INSTALLATION DO’S AND DON’TS
INSTALLATION DO’S AND DON’TS
Figure 4.6. - Silencer position relative to centrifugal fans
Don’t place a rectangular silencer hard against the discharge of
a centrifugal fan. Note the splitter orientation.
Do place a spacer between the fan and the silencer, and rotate
the splitter orientation by 90°.
Don’t site pod attenuators immediately upstream of the fan as
the attenuator pod will block the air flow to fan impeller.
However, if the pod is the same size or smaller than the impeller
hub bolting directly to the fan is acceptable.
Allow one diameter of straight duct between pod attenuator and
the fan inlet to ensure impeller obtains an even flow of air.
P
4.0 NOISE CONTROL (Cont.)
Figure 4.5. - Attenuator position relative to axial fan