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Extension Sleeve for Underfloor Adjustable Telescopic Vents G961

Original price £9.49 - Original price £9.49
Original price
£9.49 - £9.49
Current price £9.49

Product Description



Manthorpe G961 Extension Sleeve


Pack of 1    


Extension sleeve for telescopic vents.

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.

Other ventilation fittings for this product available in our shop.



Key Features

6600mm² airflow.

Allows ventilation to an underfloor void.

Allows 2 courses 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.