Ventilation Grille With Louver Grawitac. 170*170, Fi 100 Graphite - Rx 02-353

VENTILATION GRILLE WITH GRAVITY SHUTTER 170*170, FI 100 GRAPHITE Ventilation grilles with gravity shutter are designed for ventilation outside the building – as an exhaust grille. The four slats that make up the gravity shutter prevent air from “backflow,” i.e., air movement opposite to the desired one. This protects interiors from outside pollution. An additional use of the shutter is to reduce heat loss after mounting the ventilation grille with shutter outside. **