Product description
Our External Gravity Grilles serve a critical need to allow air flow through openings in buildings. The grilles are suitable for External use and are easy to install. The Grilles utilise lightweight flaps/vanes for reduced airflow restriction.
Gravity Flap Outlets are designed to provide a back-draft barrier, but are not for recommendation in exposed areas. All are designed for optimum airflow Performance. The pressure loss figures detailed below are exhaust figures.
•High-Impact Polystyrene (HIPS)
•Airflow Area: 16,000mm2
•4" (100mm) WHITE GRAVITY WALL GRILLE
with 3 gravity flaps & 4" diameter spigot at rear
Grille Measures approx 5" square inside frame, approx 5.5" square including frame