Window vent which can be mounted both protruding over a row of holes/slot, or countersunk with the wall. Fresh 31F has a flange which cover the recess. An external grille is mounted outside to prevent water penetration.
Easy to regulate Easy to assemble
Capacity at 10 Pa slot: 7,0 l/s Hole size slot (mm): 330x10 Material: ABS plastic (recyclable) Colour: White, NCS S0502-Y