Brown Gravity Flap Air Vent & Back Draught Shutter 4 Inch coming-soon Meets NHBC requirements for the

Meets NHBC requirements for the control of condensation in buildings

9 x 3 Inch (228mm x 77mm)

Features & Benefits

Complys with Building Regulations and British Standards

Built in small & easy-to-use quick release tab

Brown Gravity Flap Air Vent & Back Draught Shutter 4 Inch coming-soon Meets NHBC requirements for theProduct Description Brown 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. 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