Kair Brown 110 x 54mm Cowled Wall Vent Grille with Backdraught Shutter | Push-fit installation, Helps prevent backdraughts, Cowl helps block rain and wind, For 100mm flat ducting

KAIR COWLED WALL OUTLET 100mm x 54mm RECTANGULAR SPIGOTKair cowled vent with damper flap & 110mm x 54mm square spigot. Designed for use with 100mm / 4 inch rectangular ducting. Cowl protects against driving rain and gusts of wind entering your property via the duct run. Damper flap can be closed to help reduce unpleasant odours, noises, or draughts flowing back through your duct. The female spigot on the back of the outlet fits over male 110mm x 54mm rectangular duct pipe Part: DUCVKC249.Wipe-clean durable design for indoor or outdoor use. Suitable to use in compliance with Part F Building Regulations. Airflow performance independently tested by BSRIA or BRE. Free Air: 7200mm2.Static Pressure Drop in Pascals: 15 l/s: 4.72 Pa - 30 l/s: 17.18 Pa - 60 l/s: 62.48 Pa.Built to last out of high-quality Polystyrene/Polypropylene plastic material. Max / Min Temperature: +60c / -15c.Easy to install and durable, just push-fit duct and fittings together. For permanent fixings, seal joints with sil