Forward Curved Centrifugal Fan is especially sensitive to particulates. Forward-curved blades provide a low noise level and relatively small air flow with a high increase in static pressure. The characteristic features of this ebm-papst product series are high efficiency, a low noise level, relatively small air flow with a high increase in static pressure, robust design and space-saving application. Centrifugal fans with forward curved blades always require spiral housing. Their characteristic features are a low noise level, relatively small air flow with a high increase in static pressure, and space-saving application.