The Extension Sleeve is designed to be used in conjunction with the Telescopic Underfloor Vent. Each extension sleeve allows the vent to vertically reach a further two brick courses and can also be fitted horizontally to the base of the Telescopic Underfloor Vent by using a Rear Extension Adaptor.

Features & Benefits
– Extends Telescopic Underfloor Vent by two brick courses
– Can be installed horizontally using a Rear Extension Adaptor
– Maintains efficient airflow beneath suspended floors
– Made from durable polypropylene
– Suitable for a range of sub‑floor ventilation layouts