Extension Sleeve for Underfloor Adjustable Telescopic Vents G961
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.
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.