1201 Telescopic Underfloor Vent

Not required.

1203 Horizontal front extension.

Guidance for specification option:

Fits between the airbrick and upper front opening of the telescopic

underfloor ventilator to accommodate external walls of more than 102.5 mm thickness, up to a maximum of 215 mm.

1204 Vertical extension sleeve.

Guidance for specification option:

Fits between the upper and lower parts of the telescopic underfloor

ventilator to accommodate a vertical step of six to seven brick courses.

1205 Duct adaptor.

Guidance for specification option:

Fits on to the lower rear opening of the telescopic underfloor ventilator

to allow a standard 110 mm external diameter plastic underground

drainage pipe to be connected via a coupling connection.

1206 Horizontal rear extension

Guidance for specification option:

Fits into the lower rear opening of the telescopic underfloor ventilator

to accommodate cavity widths of 50–150 mm, or internal walls of more than 100 mm thickness, up to a maximum of 200 mm.