A through-the-wall telescopic core wall vent with a slab of mineral wool inside, the Passyfier 100 Dehumidifier Vent is mainly used in habitable rooms in which it operates without noise and extracts up to 1 litre of water per 24 hours. It can easily be retrofitted in response to condensation call-outs or installed directly into new builds. This Passyfier Vent has a TERRACOTTA External Cowl with a WHITE Internal Grille. A 132mm Diameter Core Drill should be used during Installation.