Invention Grant
US08029345B2 Fire stop outlet for small duct, high velocity air distribution systems 有权
小管道,高速空气分配系统的灭火器出口

Fire stop outlet for small duct, high velocity air distribution systems
Abstract:
A fire stop apparatus for a small duct, high velocity air distribution system is assembled to a duct opening and includes a cylindrical support wall that supports a cylindrical band of intumescent material that expands and closes the duct opening when subjected to the heat of a fire.
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