Galvanized steel frame and wings. Wings are shaped to contain the sound-proofing material, and can be horizontal or vertical. 30 mm thick galvanized steel perimeter frame.
Adhesivized PU sound-proofing material.
Screw assembling 40 mm on the flange. GTAC can be installed on walls and doors with thickness between 35 and 90 mm.
GTAC series grilles has a labyrinth construction, which allows the transit of air between two neighboring local. The interposition of sound absorption inside the wings limits noise transmission.