| 摘要 |
An air vane is inserted in the air passage of an air diffuser and extends longitudinally above the lower portion of the outlet (the inlet if a return air unit) slot. The air vane is supported at its lower surface by resting on a horizontal surface forming one side of the outlet slot of the air passage. One or more pin members may be either fixedly attached to the vane itself or to a side portion of the air passage. This pin member will be constructed of a suitable material, having a low melting point, so that when a fire occurs in a room area below the ceiling system utilizing the subject air vanes, the pin member will melt and vaporize thereby allowing the vane to fall downwardly and close off the outlet slot thereby providing a fire stop damper.
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