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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
hoses and tools
Takes the place of a single 9" x 3" brick
to the Robust Construction Detail U-Value of 0
The tortured path through the 4mm louvred grill and internal geometry is designed to maintain airflow whilst channelling any water ingress out of the vent and on to the roof covering
Aesthetically pleasing and simple to install modular system
Grey Gravity Flap Air Vent & Back Draught Shutter 4 Inch Corner Wall Protectors hoses and toolsProduct Description Grey Gravity Flap Air Vent & Back Draught Shutter For 4 Inch (100mm) Extractor Fan Ducting Gravity Flap Vent Wall vent with gravity flaps and weather sill. Helps prevent backdrafts. Manufactured with UV stable materials to reduce colour fade. Suitable for round 100mm (4 Inch) ducting. Overall size: 140mm x 140mm. British made. ABS thermoplastic. Complies with Part F building regulations. Suitable for commercial and domestic use.
