Kair Black 100mm Gravity Wall Vent Grille - 4 Inch Round

Improve your ventilation system with the Kair Black 100mm Gravity Wall Vent Grille. Designed for both indoor and outdoor use, this versatile air inlet and outlet is an ideal solution for managing airflow in various environments. Whether you are upgrading a bathroom extractor fan, a kitchen ventilation setup, or a hydroponics system, this grille provides a reliable connection to your ductwork. The unit features a 155mm x 155mm front cover and a 99.5mm (4 inch) round rear spigot, making it compatible with standard 100mm ducting. One of the main advantages of this design is the integrated gravity shutter flaps. Unlike spring-loaded models that can fail over time, these non-return flaps operate using gravity to close automatically when not in use. This helps prevent unpleasant odours, unwanted noises, or cold draughts from flowing back through your ductwork. Installation is straightforward thanks to the push-fit design, allowing you to connect it easily to existing ducts and fittings. This grille is also suitable for use as part of a longer ductwork run, providing a durable and efficient way to manage air extraction in your home or growing space.