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UL 793

UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat

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Organization: UL
Publication Date: 31 December 2008
Status: active
Page Count: 15
scope:

These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist primarily of a body frame, one or more damper covers and hatches, and operating mechanisms which generally include a heat responsive device and spring(s). Gravity-opened vents consist primarily of a body frame and nonmetallic drop-out panel. The vents covered by these requirements are operated manually or automatically in the event of fire to remove smoke and heat from the building. Automatic operation does not depend on electrical power or other energy sources that may be interrupted during a fire, but rather depends upon operation of a heat responsive device or on the action of a plastic cover shrinking and falling from place due to fire exposure, or the like. These vents are not intended for use as general purpose building ventilation devices.

 

Document History

UL 793
December 31, 2008
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist...
December 31, 2008
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist...
December 31, 2008
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist...
December 31, 2008
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
These requirements cover automatically operated roof vents for smoke and heat that fall into two general categories: mechanically-opened and gravity-opened. Mechanically-opened vents consist...
June 30, 2003
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
A description is not available for this item.
June 30, 2003
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
A description is not available for this item.
November 29, 1995
UL Standard for Safety Automatically Operated Roof Vents for Smoke and Heat
A description is not available for this item.

References

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