ANAHEIM, Calif. - You might be wondering, "What could possibly be new in the area of grilles, registers, and diffusers?" If you attended the 2004 International Air-Conditioning, Heating, Refrigerating ...
In many a floor/ceiling and roof/ceiling assembly listed in UL’s Fire Resistance Directory, a ceiling membrane is required to thermally protect the structural members of the assembly in the event of a ...
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