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8Manufacturing Standard: BSEN 60454-2
For extractor fans & soil pipes
Complies with Building Regulation 2000 Approved Documents F (2004 edition) & J (2002 edition)
Fully independently wind tunnel tested
9" x 3" Inch
Brown Extractor Fan Air Vent Louvre Grille for 4 Inch Ducting Cable Ties 8Manufacturing Standard: BSEN 60454-2Product Description Brown Air Vent Ducting Grille For 4 Inch (100mm) Extractor Fan Ducting Louvre wall vent and weather sill. 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 commercial and domestic use. Other vents and colours