2 x Cavity Wall Combination Extension Sleeves for 9" x 3" Air Brick Vents G935

• Manthorpe Telescopic Underfloor Vents and Extensions.
• Manthorpe Telescopic Underfloor Vents and Extensions.
• Designed to provide a clear airflow passage to the void underneath a suspended floor.
• Provides 6,600mm² of airflow.
• The telescopic feature enables it to be adjusted between 3 and 5 brick courses.
• Meets NHBC requirements for the control of condensation in buildings.

Manthorpe Telescopic Underfloor Vents Menu Options Designed to provide a clear airflow passage to the void underneath a suspended floor. Telescopic vent Part number: G960. Provides 6,600mm² of airflow. The telescopic feature enables it to be adjusted between 3 and 5 brick courses. The right airflow can be achieved when the ventilator is used with a Manthorpe G930 airbrick. Special grille included to prevent entry of vermin. Extension sleeves and other fittings for this product available in our shop. Meets NHBC requirements for the control of condensation in buildings. Underfloor Vent Product Range G960 Telescopic underfloor vent: Steps 3 - 5 brick courses. G961 Extension sleeve: Steps 150mm vertically or 185mm rear horizontally. G962 Remote void vent: Fits onto the bottom of the G960 telescopic vent. G935 Pair of cavity sleeves: Fits to the front of the telescopic for a 120 - 280mm extra extension. Key Features 6,600mm² airflow. Allows ventilation to an underfloor void. Allows a 3-5 course stagger. Additional depth and cavity span available with extension sleeve. Regulations & Standards BRE Digest 17. BRE Digest 262. Building Regulations C4. NHBC Standards 5.2. BS 5250:2011 Control of Condensation in Building.