Passive dehumidifier to increase room ventilation, helps prevent black mould.
An opening with airflow controlled automatically by a mineral wool slab, avoiding undue draughts, with an effective area well above the minimum requirement for habitable rooms. Kitchens and bathrooms will generally require mechanical ventilation to cope with the greater amounts of moisture generated.
Air tested by the Building Research Establishment for airflow rates versus applied pressure difference.
No moving parts
Works passively 24 hours a day
Quiet operation (makes no noise)
Low installation costs
Designed to fit 230 x 155 mm aperture (i.e. standard 9 x 6" airbrick)
Length (closed to extended): 240–340 mm
U90/34 Through wall ventilator ducts
U90/340 Through wall ventilator ducts
Passive Vapour Vents
|Standard product features|
Length (closed to extended): 240–340 mm.