Maximum air throughput via pleated filter included in the delivered state Easy filter changes
,thanks to a new opening mechanism on the louvred grille . Faster installation on the enclosure with optimised detent hooks Diagonal fan technology achieves more even and constant ventilation of the enclosure, thanks to improved pressure stability. Tool-free assembly
Type 12 with chopped-fibre filter/pleated filter . Type 3 . Type 3R . Type 4. Type 4X with chopped-fibre filter/pleated filter and hose-proof hood . With the fan-and-filter unit 3237.XXX, electrical connection is made via two single wires (length approx. 300 mm) on the unit, for all other fan-and-filter units, a screwless spring terminal is used . Miniature circuit-breaker/fuse: 4 A