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9" x 3" Manthorpe Extendable Combination Cavity Wall Sleeve Vent

Original price £9.97 - Original price £13.29
Original price
£9.97 - £13.29
Current price £13.29

Product Description



Extendable Cavity Wall Sleeve Vent 


Menu Options


9" x 3" Inch



Ventilation for heating and gas appliances with integral wind baffle.

This vent is to increase the airflow in a room to eliminate condensation with this sleeve vent for heat producing appliances.

Extends to suit wall thickness of 190mm - 335mm.

Additional G935 extension sleeves available in menu options.

Each pair of extension sleeves adds on a extra 120 - 280mm.

Finished with 9" x 3" louvre vent for internally and air brick for externally.

Aesthetically pleasing and simple to install modular system.

Provides a maximum equivalent area of 5500mm² of free air space.

Meets NHBC requirements for the control of condensation in buildings.

Manufactured by Manthorpe Building Products with the exception of air vent

Other Manthorpe adapters and fittings for this product available in our shop.          




To provide ventilation for heat producing appliances
To provide background room ventilation
Individual ventilation sets can supply up to maximum appliance rated input of 18kW (61,500 Btu/h)
For new build, refurbishment and remedial work



Features & Benefits

Aesthetically pleasing and a simple to install modular system
Excellent airflow properties
Independently tested by BRE
Offers reduction of draughts and light compared to basic through wall ventilation
Internal finish with open louvre grille



Regulations & Standards

BRE Digest 17
BRE Digest 262
Building Regulations C4
NHBC Standards 5.2BS 5250:2011 Control of Condensation in Buildings