Div. B › Part 3 › 3.6 › 3.6.3 — Vertical Service Spaces and Service Facilities

3.6.3.5 — Grease Duct Enclosures

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(1) Except as provided in Sentence (2), fire separations enclosing grease ducts for commercial cooking operations shall conform to NFPA 96, “Ventilation Control and Fire Protection of Commercial Cooking Operations”.
(2) The fire-resistance rating of field-applied and factory-built grease duct enclosure assemblies shall be determined in conformance with CAN/ULC-S144, “Fire Resistance Test - Grease Duct Assemblies”.
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