Easy-to-fit horizontal and vertical extension accessories designed for use with the 1201 and 1201XL Telescopic Underfloor Ventilators. Multiple units can be used to achieve greater depths and heights.
1203 – Horizontal Front Extension Sleeve
Fits between the airbrick and upper front opening of the telescopic underfloor ventilator to accommodate external walls of more than 102.5mm thickness, up to a maximum of 215mm
1204 – Vertical Extension Sleeve
Fits between the upper and lower parts of the telescopic underfloor ventilator to accommodate a vertical step of 6 to 7 brick courses.
1205 – Duct Adaptor
Fits on to the lower rear opening of the telescopic underfloor ventilator to allow a standard 110mm external diameter plastic underground drainage pipe to be connected via a coupling connection.
1206 – Horizontal Rear Extension Sleeve
Fits into the lower rear opening of the telescopic underfloor ventilator to accommodate cavity widths between 50-150mm – or internal walls of more than 100mm thickness, up to a maximum of 200mm.
Uses:
| Description | To suit | Product code |
|---|---|---|
| Horizontal front extension | +115mm | 1203 |
| Vertical extension sleeve | Additional 2 brick courses | 1204 |
| Duct adaptor | Suits 110mm diameter duct | 1205 |
| Horizontal rear extensions | +100mm | 1206 |
The table below shows how the build-up of telescopic underfloor ventilators and vertical extension pieces achieve the required building in height.
| Description | Brick height | Rise (mm) |
|---|---|---|
| 1201 telescopic underfloor vent | 3-5 | 225/375 |
| +1 no. 1204 vertical extension sleeve | 6-7 | 450/525 |
| +2 no. 1204 vertical extension sleeve | 8-9 | 600/675 |
| +3 no. 1204 vertical extension sleeve | 10-11 | 750/825 |
| +4 no. 1204 vertical extension sleeve | 12-13 | 900/975 |