Extension Sleeve for Underfloor Adjustable Telescopic Cavity Wall Vents G961

Manthorpe G961 Extension Sleeve

Pack of 1    

Extension Sleeve 9" x 3" for cavity wall ventilators.

Part number: G961.

Can be used for vertical or rear horizontal extension.

Designed to be used with G960 Manthorpe telescopic vents.

Each unit extends the under floor ventilator a further 150mm vertically or 185mm horizontally.

Further extension can be added.

Provides a maximum equivalent area of 6600mm² airflow.

Meets NHBC requirements for the control of condensation in buildings.

Key Features

6600mm² airflow.

Allows ventilation to an underfloor void.

Allows a 2 course per extension.

Regulations & Standards

BRE Digest 17.

BRE Digest 262.

Building Regulations C4.

NHBC Standards 5.2.

BS 5250:2011 Control of Condensation in Building.