A cover for fan units mounted on walls . The cover fits around the fan unit and is affixed to the wall . The unit is fronted with an MG Grille (Product 35), fitted with intumescent strips to expand in a fire and seal the openings, thus preventing fire and smoke from spreading.
For use with Vent-Axia, Expelair and other fan types.
Size - height x width x depth
Envirograf Product 14