UL 1978

UL Standard for Safety Grease Ducts

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Organization: UL
Publication Date: 13 December 2010
Status: active
Page Count: 41
scope:

These requirements cover factory-built grease ducts, and grease duct assemblies that are intended to be installed at reduced clearances where 18 inch (457 mm) clearance is specified in the Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, NFPA 96, and the International Mechanical Code.

These requirements also cover modular grease duct assemblies, unwelded connections between adjoining duct parts, fittings, access doors, and the like intended for use with grease ducts installed in accordance with NFPA 96 and the International Mechanical Code.

These requirements do not address NFPA 96 and the International Mechanical Code requirements for grease duct enclosures. Grease ducts covered only by these requirements are intended to be installed in a fire resistive enclosure when required by NFPA 96 or the IMC.

Requirements used to evaluate the effectiveness of the combination of a grease duct and an enclosure as a fire rated enclosure system and through penetration firestop system, as well as the enclosure's effect on the grease duct are contained in Standard for Tests of Fire Resistive Grease Duct Enclosure Assemblies, UL 2221, and ASTM E 2336, Standard Test Methods for Fire Resistive Grease Duct Enclosure Systems.

Document History

UL 1978
December 13, 2010
UL Standard for Safety Grease Ducts
These requirements cover factory-built grease ducts, and grease duct assemblies that are intended to be installed at reduced clearances where 18 inch (457 mm) clearance is specified in the Standard...
December 13, 2010
UL Standard for Safety Grease Ducts
These requirements cover factory-built grease ducts, and grease duct assemblies that are intended to be installed at reduced clearances where 18 inch (457 mm) clearance is specified in the Standard...
December 13, 2010
UL Standard for Safety Grease Ducts
These requirements cover factory-built grease ducts, and grease duct assemblies that are intended to be installed at reduced clearances where 18 inch (457 mm) clearance is specified in the Standard...
January 21, 2005
UL Standard for Safety Grease Ducts
A description is not available for this item.
January 21, 2005
UL Standard for Safety Grease Ducts
A description is not available for this item.
June 25, 2002
UL Standard for Safety Grease Ducts
A description is not available for this item.
March 29, 1995
UL Standard for Safety Grease Ducts
A description is not available for this item.
January 1, 1995
UL Standard for Safety Grease Ducts
A description is not available for this item.

References

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