If a centrifugal fan is combined with a spiral housing, this is referred to as a centrifugal blower. Centrifugal, single inlet: "Single inlet centrifugal blowers" refers to blowers with a spiral housing that is open on one side. The characteristic features of this ebm-Nadi 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 properties.

Centrifugal, double inlet: "Dual inlet centrifugal blowers" refers to blowers with a spiral housing that is open on both sides. The characteristic features of this ebm-Nadi product series are high efficiency, a low noise level, robust design and space-saving properties.