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The vent can easily be fitted in both refurbishment and new build situations with the use of a 5" (127mm) diameter core drill
Required Joist Opening: 562mm x 726mm
Chained lockable utility hooks
Internal dimension: 180mm
Telescopic Adjustable Underfloor Ventilators
Manthorpe White Interlocking Air Brick Vents Pack Size:20 The vent can easily beProduct Description Manthorpe White 9" x 3" Air Brick Vents Plastic interlocking air brick ventilator. Part number: G930. Provides 6,450mm of airflow per 9" x 3" airbrick. Clip together facility provides a choice of ventilation sizes. Can be stacked together to create 9" x 6" and 9" x 9" combinations. Additional G935 extension sleeves available in . Moulded in mortar key ensures secure adhesion to the building fabric. Meets NHBC requirements for the
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