Manthorpe G961 Vertical Extension Sleeve

The G961 Extension Sleeve has been designed for use with the Manthorpe range of Telescopic Underfloor Ventilators Allows ventilation to deeper underfloor voids 6,600mm² airflow Additional depth and cavity span Allows an extra 2 courses vertically per unit Provides an extra 150mm horizontal extension through wider cavities Quick and easy push fit assembly with the underfloor vents Maintains an unobstructed airflow path through the wall