Ventilation Grille 150 mm, Rectangular Aeration Grille 175 x 175 mm with Insect Mesh and Ventilation Grille for HVAC System, Extractor Hood, Air Outlet

Gravity-controlled ventilation flaps of this 150mm air vent will automatically open in response to the airflow generated by dryers or exhaust fans; when the appliances are not working, the flaps of this 150mm ventilation grille close tightly to prevent cold air backflow and block the ingress of dust and rain, ensuring the tightness of the entire ventilation system. The external wall ventilation grille is made of PP plastic and with this rectangular ventilation grille provides exceptional durability and corrosion resistance to ensure long-lasting protection of ventilation ducts. This rectangular ventilation grille has an integrated insect mesh and comes with 4 fixing screws for secure installation and long life. This air vent size is 175mm×175mm; Outer diameter of the ventilation opening:149mm, perfectly fits 150mm flexible ventilation ducts; This ventilation grille can be used as a universal ventilation cover for indoor and outdoor supply and air extraction systems. Featuring pre-drilled fixing holes and lightweight construction, the outdoor wall ventilation grille with built-in insect mesh can be quickly installed on exterior walls with this closable ventilation grille. No complicated installation process is required with this closable ventilation grille, allowing you to easily upgrade your home's ventilation system. Suitable for bathrooms, kitchens, offices, extractor hoods, basements, storage rooms and exterior wall ventilation. This air extraction grille is designed for both private and commercial use and offers a wide range of applications with this air extraction grille.