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UL
UL 1978:4ED 2010-12

UL 1978:4ED 2010-12

Current

Current

The latest, up-to-date edition.

Grease Ducts

Available format(s)

Hardcopy

Published date

12-13-2010

Publisher

Underwriters Laboratories

Foreword
Introduction
1 Scope
2 General
3 Glossary
4 Installation instructions
Construction
5 Materials
6 Assembly
7 Joints
8 Support assembly
Performance
9 General
10 Test installations
11 Temperature measurement
12 Temperature test - 500 deg F (260 deg C) flue gases
13 Abnormal temperature test
14 Leakage test
15 Vertical support test
16 Strength tests
17 Fire and leakage test of grease duct access doors and
   fittings
18 Pressure tests for fittings exposed to fire
   extinguishing system pressure
19 Tensile strength, elongation, and change in volume
   tests of gaskets and seals
Marking
20 General
Appendix A - Standards for components

Describes 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.

DevelopmentNote
NEW CHILD REV 3 2021 IS NOW ADDED.
DocumentType
Standard
Pages
0
ProductNote
NEW CHILD REV 3 2021 IS NOW ADDED.
PublisherName
Underwriters Laboratories
Status
Current

NFPA 96:2024 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations
ASHRAE 154 : 2016 VENTILATION FOR COMMERCIAL COOKING OPERATIONS
UL 2221:2ED 2010-08 Standard for Tests of Fire Resistive Grease Duct Enclosure Assemblies
NFPA 96 : 2017 VENTILATION CONTROL AND FIRE PROTECTION OF COMMERCIAL COOKING OPERATIONS
ICC IMC Code and Commentary : 2015 IMC® Code and Commentary
ICC 2012 INTERNATIONAL MECH. CODE : 2012 INTERNATIONAL MECHANICAL CODE

UL 2221:2ED 2010-08 Standard for Tests of Fire Resistive Grease Duct Enclosure Assemblies

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Hardcopy - English
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