Airflow 100mm Terracotta External Air Vent Cover Gravity Grille 154x154mm Square Wall with Round Rear Spigot & Backdraught Shutter Flaps for Extractor Fans Bathrooms

Perfect Fit for 100mm Ducting – Airflow gravity vent grille features a 100mm (4 inch) round rear spigot and 154x154mm square external wall cover plate, providing a clean and professional finish on any interior or exterior wall surface. Automatic Backdraught Shutter Flaps – Gravity-operated flaps open with airflow and close automatically when the extractor fan is off, preventing cold draughts, rain ingress, insects, unpleasant odours, and noise from entering through the duct — no springs to wear out or break. Quick & Easy Push-Fit Installation – Simply push-fit onto standard 100mm ducting for a fast, hassle-free install. Can be sealed with mastic, silicone, or waterproof tape for a secure weatherproof finish suitable for indoor and outdoor use. Versatile Ventilation Compatibility – Ideal for bathroom extractor fans, kitchen extractor fans, utility rooms, tumble dryers, hydroponics fans, inline extract fans, whole house ventilation, HVAC, heat recovery systems (MVHR), positive input ventilation (PIV), and passive airflow systems. Building Regulations Compliant – Manufactured in accordance with Approved Document F, ensuring compliant domestic ventilation installations. Made from durable UV-resistant plastic for long-lasting indoor and outdoor performance., Weight: 0.220462262 Pounds, Manufacturer: Airflow