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These requirements and methods of test apply to fire damper assemblies rated 3/4 h, 1 h, 1 1/2 h, 2 h, or 3 h for use in air-conditioning and ventilating system ducts or openings (without ducts) piercing horizontally or vertically oriented fire separations where the fire separations are required to have a fire resistance rating of not more than 4 h.
Standard for Thermal Insulation, Polystyrene Boards (ULC S701.1)standard by Underwriters Laboratories of Canada, 02/25/2022
STANDARD FOR 650 °C FACTORY-BUILT CHIMNEYSstandard by Underwriters Laboratories of Canada, 04/07/2022
Standard for Factory-Built Type A Chimneysstandard by Underwriters Laboratories of Canada, 04/07/2022
Standard for Fireplace Inserts (ULC S628)standard by Underwriters Laboratories of Canada, 04/07/2022