Upgrade Airflow Hon&Guan Removable Roof Vent Cap, 4 Inch Roof Dryer Vent for Houses, 4 Inch Exhaust Vent for Ventilation System-with Damper and Two New Small Vents,Galvanized Steel

Upgrade Ventilation : Compared with the traditional roof vent, Hon&Guan new roof vent cover with damper has 2 new small vents on the left and right sides, and the head adopts a flat streamline design, which upgrades the ventilation efficiency to 85%, and better meets the needs of efficient ventilation., Waterproofing Optimization :Our 4'' roof exhaust vent increase the height of the flange at the bottom of the check valve to 0.6in and designed a waterproof strip for the external mesh cover to effectively prevent rain or snow from entering the room., Home Guard High-quality galvanized steel to ensure durability and long-lasting use.The roof vent 4 inch comes with a grid gap of about 3mm to effectively prevent the entry of small animals or birds., Widely Use Designed for maximum airflow and protection, our vents can be used not only with kitchen range hood and bathroom exhaust fan or other rooftop ventilation systems, but also for wall mounting, with dryers or other HVAC systems., Easy Installation The package contains 4 screws for fixing the head, one of which is used for spare, convenient to remove it when you need to clean, does not include the bottom fixing screws.4 holes in the panel, which can help you install on the 4” bathroom exhaust fan roof jack more firmly.