Light duty FCC (forward curved centrifugal) fans are commonly used for the transportation of clean air only in ducted systems. The fans can be placed in air handling units or a plenum attached to several metres of ducting.
The FCC fan is almost always preferred in clean air applications mainly because of cost. While the BCC (backward curved centrifugal) fan is a more efficient performer, the FCC is considerable less expensive but has its limitations.
Sizes range from 250mm to 1000mm. The larger units are normally mounted on a base while the smaller range has a ‘cubic’ frame to support the motor or in some cases the motor can simple be ‘piggy back’ mounted on the fan.
These fans are always belt driven which allows for a very large scale of various permutations for both volume and pressure. Changing pulley diameters can deliver any required volume and pressure within the speed limitations of the fan.