Ventilation system for ridge of roof or grating in building has panel of air-permeable fire resistant fibrous material consisting of mixture of basalt and glass fibers held in metal frame

摘要

The fibrous panel may be made of a mixture of basalt and glass fibers of basalt and artificial fibers or glass fibers and artificial fibers. The fibers may form a woven fabric, or a felted structure. The fibers may be deposited in several layers. The metal frame may especially be made of aluminum. The panel may be used between -260 and +500 degrees C, and may be sintered at 1050 degrees C.