Must be installed according to UL Standard 263.
Greenheck fire-rated grilles, registers and diffusers are classified and listed by UL for use in restrained and unrestrained floor/ceiling or roof/ceiling assemblies with up to a 3-hour rating.
Louvered Face Diffusers
Louver face ceiling diffuser with a UL-listed ceiling radiation damper.
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Step Down Diffusers
Fire-rated 2-cones and 3-cones square face diffusers with a UL-Listed ceiling radiation damper.
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Perforated Face Diffusers
The look of a perforated diffuser in a fire-rated package.
VIEW Perforated Face Diffusers