Fans by Fantech Electronic Catalogue

2016

Figure 4.4. - Attenuator position relative to axial fans

Don’t site a rectangular attenuator close to an axial fan intake or

discharge. Air is accelerated through an attenuator and fan

discharge air is uneven and swirling.

Allow adequate distance between attenuators and fan.

4.0 NOISE CONTROL (Cont.)

Figure 4.3. - Attenuators in relation to bends

Don’t use attenuator splitters as shown when sited close to a

bend as the pressure loss across it will be greater than

expected.

Do ensure attenuator splitters are in the plane of the bend as

shown. Fit turning vanes only if R/W<1.0

INSTALLATION DO’S AND DON’TS

P-12