Noise control for axial fans and centrifugal roof extractors
We have provided many companies with noise control for axial fans and centrifugal extractors that are mounted on the roof. In this example, a simple solution was to apply minor modifications to the cowl that fits over the fan impeller. This technique achieves high noise reductions at low cost. Roof-mounted axial and centrifugal fans are a common cause of noise nuisance complaints from local residents.