Manthorpe Dual Extended Underfloor Vent

The G965 Dual Extended Telescopic Underfloor Void Ventilator is designed
to provide a clear airflow passage to avoid beneath an insulated
suspended floor.

The current and future requirements of Part L of the Building
Regulations along with other standards and regulations have led to an
increase in the depth of thermal insulation in suspended floors along
with an increase in cavity widths to accommodate greater amounts of
cavity wall insulation. This has meant that clear access to an
the underfloor void may be as far as 6 or 7 brick courses (525mm) below the
level of an airbrick and potentially as much as 350mm from the outer
face of the external leaf. Traditional telescopic underfloor ventilators
would not be able to achieve this without the use of additional
vertical and horizontal extension sleeves.

The G965 offers a vertical telescopic adjustment of between 5 and 8
brick courses without the need for an extension sleeve. The horizontal
outlet is long enough to bridge through an overall wall thickness of
350mm without the need for an additional extension.

The front aperture of the G965 is designed for use with a G930
Combination Airbrick or it can be used in conjunction with a traditional
clay airbrick, although this would reduce the overall airflow through
the system.