Fantronix 4 inch Push Fit PVC Gravity operated Bathroom Ventilation Extractor Fan Not Return Air Valve Back draft Shutter Outlet Damper Grille 100mm Whole House

Modern wall vent finish – Brown grille provides a clean, tidy appearance that suits modern render, concrete walls, and contemporary exterior designs. Gravity non-return shutters – Built-in gravity flaps close automatically when not in use, helping prevent draughts, odours, and external noise flowing back through the duct. Quick push-fit installation – Push-fit design allows fast connection to ducting and fittings, ideal for bathroom, kitchen, hydroponics, or inline extractor fan installations. Wide ventilation compatibility – Suitable for longer duct runs including whole-house ventilation, passive systems, HVAC, air conditioning, and heat recovery applications Part F suitable design – Suitable for use within ventilation systems designed to meet UK Building Regulations Part F airflow and ventilation requirements