Ventilation Grille With Gravity Louver 170*170, Fi 100 Brown - Rx 02-309

SPECIFICATION: Size: 170 x 170 mm Color: brown FI: 100 mm Ventilation grille with gravity louver are intended for ventilation outside the building – as an exhaust grille. The four lamellas forming the gravity louver prevent air from “backflow”, i.e. movement opposite to the desired one. This protects the interior from outside contamination. An additional use of the blinds is reducing heat loss after installing a ventilation grille with a blind on the outside. **