EXTENSION FOR UNDERFLOOR VENT BLACK

Packed: 20

RVABUFEXBL

Designed for use with the telescopic underfloor ventilator
Each extension sleeve allows the vent to reach a further two brick courses vertically
The sleeve can also be fitted to the base of the telescopic vent to provide horizontal extension through larger cavities
6,600mm² airflow
Allows a 3-5 course stagger + 2 courses per unit (a further 150mm vertically or 185mm horizontally)
Regulations - BRE Digest 17, BRE Digest 262, Building Regulations C4, NHBC Standards 5.2 and BS 5250:2011 Control of Condensation in Building
Made from polypropylene
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