- A silencer affects only noise resulting from air turbulence within the fan. It does not affect noise radiated through the fan housing, mechanical noise produced by the motor & drive, or noise produced by vibration.
- Radiated noise can be reduced by insulating the fan housing and/or enclosing the fan. Mechanical noise produced by the motor and drive can be reduced by enclosing the fan.
- Sound pressure levels vary with characteristics of a given fan location (surrounding equipment, walls, outdoor or indoor environment, etc.). Therefore sound pressure levels cannot be guaranteed at an installation site.
- Silencers are intended to be supported externally (by others). Fans are not designed to support silencers.
