Underfloor Vent Horizontal Front Extension +115mm

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: To provide horizontal or vertical extension to a telescopic underfloor ventilator to accommodate different wall/cavity/brick courses etc. To connect the ventilator to a duct.