Periscope Underfloor Ventilator – can be adjusted for a step of 3, 4 or 5 brick courses.
Horizontal Front Extension Piece – fits between the airbrick and upper front opening of the periscope vent for external walls of more than 102.5mm thickness and up to 215mm (further pieces can be fitted and trimmed for greater width wall thicknesses).
Vertical Extension Piece – fits between the upper and lower parts of the telescopic underfloor vent for a vertical step of more than 5 brick courses (additional pieces can be stacked together to achieve required height).
Horizontal Rear Extension Piece – fits into the lower rear opening of the periscope vent for cavity widths between 50-150mm or for internal walls of more than 100mm thickness (maximum 200mm).
The underfloor ventilator system is light and easy to handle yet made from extremely tough and robust injection moulded polypropylene that is totally resistant to rot and decay.
Available in BLACK only.