Passive Ventilation Unit
The environmentally friendly Perma-Vent contains no moving parts and requires no maintenance. It works on the scientific principle that when the room temperature and humidity are greater internally than externally, moist air will be ventilated outside the building due to vapour air differences.
The Perma-Vent contains a vapour permeable membrane, which allows vapour out of the building without allowing a draught back inside.
Installing a Perma-Vent unit
The unit is easily and economically installed using a 4.25” (107mm) core cutter. It can be positioned wherever co...
