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For all measurements please see picture chart
natural gas
with the rebated unit allowing adequate clearance for any extended guttering
toilets and kitchens
Manthorpe Grey Interlocking Air Brick Vents Pack Size:10 For all measurements please seeProduct Description Manthorpe Grey 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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