At the bottom of the enclosure there is a slide-on cable feed in the base chassis with a foam rubber seal, creating an opening for cable routing from which air can be drawn in. There is a removable cover with ventilation slots in the roof, which allows air to escape upwards from the enclosure. In addition, brush inlets are included in the roof and base area (from 26 U for 800 mm width).

The air flow is passive, i.e. there is no active ventilation (e.g. built-in fans) in the standard enclosure. The manufacturer calls this "passive ventilation".