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Discreet solution to the problems of flood damage caused by unprotected airbricks
Assorted Heavy Duty Raw Wall Plugs
450mm² of airflow per 9" x 3" airbrick
Ventilation for heating and gas appliances with integral wind baffle
6600mm² airflow
Brown Hooded Cowl Extractor Air Vent & Back Draught Shutter 4 Inch access_doors_panels Discreet solution to the problemsProduct Description Brown Hooded Cowl Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Hooded Cowl Vent Hooded Wall vent with internal back draught shutter. Helps prevent backdrafts. Manufactured with UV stable materials to reduce colour fade. Dual fitting for round 100mm (4 Inch) ducting or square ducting. Overall size: 140mm x 140mm. British made. ABS thermoplastic. Complies with Part F building regulations. Suitable for