Structure-borne sound-absorbing fan (1-speed, energy-saving capacitor motor, motor type: CNA45/20L60) incl. filter and white cover plate (colour similar to RAL 9016) for the compact fan series. The filter (filter class ISO Coarse >45%) of the fan can be easily replaced without tools. The patented spring system compensates for up to 80 mm of masonry between the box, which is inserted too deep, and the cover or front wall. The electrical connection to the power unit/motor control is made when the blower is installed. The blower's power unit has a factory-fitted C-NR overrun module (standard setting: 16 min. overrun).