Airflow Backdraught Flap for Ø100mm Ducting Use with Extractor Fans, Prevents Draughts, Odour & Noise, Improves Energy Efficiency Indoor Air Quality

Prevents Cold Draughts & Backflow – The integrated gravity-operated flap opens when your extractor fan is running and closes automatically when airflow stops, helping to prevent cold air, unwanted draughts, odours, and backflow from entering your property. Enhances Energy Efficiency – By reducing unwanted air leakage through ventilation ducts, this non-return valve helps maintain indoor temperatures, reducing heat loss and supporting a more energy-efficient home environment. Minimises External Noise & Unpleasant Odours – Creates an effective barrier against outside noise, cooking smells, and stale air travelling back through ducting systems, helping to maintain a fresher and more comfortable indoor space. Designed for Ø100mm Ventilation Ducts – Suitable for use with standard 100mm (4-inch) ducting systems and compatible with bathroom extractor fans, kitchen extractors, utility room ventilation, tumble dryer vents, and other HVAC applications. Reliable, Low-Maintenance Design – Manufactured from durable, high-quality plastic for long-lasting performance. Lightweight construction allows for quick installation within duct runs while requiring minimal maintenance over time.