A roof-mounted fan extracts warm air from inside the switchgear cabinet, thereby helping the
circulation of warm air and preventing heat accumulation in the upper section of the cabinet. A
robust sheet-steel hood with a stepped rim prevents water from entering. An all-round filter mat
for protection class IP54 is available as an option. Radial fans generate a high air flow with low
noise emissions. The roof vent DE 400 without fan is fitted with a filter mat that can be replaced
from indoors as standard. Roof-mounted fan DL 1500, which is characterised by its high air flow
and particularly low noise emission, is predestined for use in server cabinets.
