Buff Air Brick Vents 9" x 3" brick Grille Pack of 10 Plastic air brick ventilator. British Made. Integral clip together facility allows multiple air bricks to be stacked. Can be stacked to form 9”x 6” and 9”x 9” sizes. Suitable for commercial and domestic use. Satisfies NHBC standards. Manufactured to BS EN ISO 9001. Available in a range of colours in our shop. Use Air bricks to be used in conjunction with the telescopic underfloor ventilator for providing ventilation below suspended ground floors Air bricks to be used in conjunction with cavity sleeves for ventilation through external walls to a building interior Features & benefits Air Brick (1201ab) equivalent area 6170mm² per unit Unique stepped front grille greatly reduces the entry of wind driven rain 6.5mm wide front grille openings comply with BS 5440 Pt 2 and British Gas requirements Integral clip together facility allows multiple airbricks to be stacked to form 9”x 6” and 9”x 9” sizes Available in a range of colours to blend in with various brick types Very tough and robust Durable and totally resistant to decay Quality Satisfies all NHBC Standards 2008 Edition Manufactured to BS EN ISO 9001 : 2008 Complies with all relevant Building Regulations Meets all relevant British Standards ‘Equivalent Area’ tested by BRE to BS EN 13141-1:2004