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Acoustic Aero Wall dB Anti Draught Ventilators
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Anti-draught ventilators can be installed in new and existing walls
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To fit into an existing build: stitch drill and remove brickwork to one brick wide x either one or two brick high, and fit the sloping away from the inner wall
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Large flanges around the external cowl and internal grille allow for minor irregularities to be covered easily and also adequate fixing
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An external cowl will push onto sleeve and can be silicone sealed to face or screw fixed
