Building Products Listing Program
- CL4 Inc.
- Mineral-fiber Fireproofing Materials – Grease Ducts
- Kemptville, Ontario, Canada
- January 6, 2012
- May 5, 2021
ASTM E2336 “Standard Test Methods for Fire Resistive Grease Duct Enclosure Systems”. CAN/ULC S144 “Standard Method of Fire Resistance Test – Grease Duct Assemblies”. ASTM E136 “Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750oC”. CAN/ULC S102 “Standard Method of Test for Surface Burning Characteristics of building Materials and Assemblies.”
CL4Fire Blue Label Mineral-fiber Fireproofing Insulation
CL4Fire Red Label & CL4Fire Code 96 Mineral-fiber Fireproofing Insulation
CL4Fire products have surface burning characteristics determined in accordance with CAN/ULC S102 as outlined below.
Product Nominal Density lbs/ft3 (kg/m3) Flame Spread Index Smoke Developed Index CL4Fire Blue Label 8 (128) 10 10 CL4Fire Red Label 6 (96) CL4Fire Code 96* 6 (96)
Note: CL4Fire Code 96 follows all the same installation requirements as CL4Fire Red Label but has an integral wire mesh per NFPA 96 22.214.171.124 for added support.
CL4Fire Blue Label, Cl4Fire Red Label and CL4Fire Code 96 are classified as non-combustible per ASTM E136.
CL4Fire Grease Duct Ratings for Use in ASTM E2336 / CAN/ULC S144 Required Assemblies
Product Installation Minimum Installed Thickness inches (mm) Nominal Density lbs/ft3 (kg/m3) Fire Rating Achieved Hours CL4Fire Blue Label 2 Layers 1 1/2″ (38mm) Compressed Butt Joints or Overlap Minimum 3 inches (76 mm) at Seams. 3″ (76mm) 8 (128mm) 2 1 Layer 3 inch (76 mm) Compressed Butt Joints or Overlap Minimum 3 inches (76 mm) at Seams. 3″ (76mm) 8 (128) 2 CL4Fire Red Label or CL4Fire Code 96 2 Layers 1 1/2″ (38mm) Compressed Butt Joints or Overlap Minimum 3 inches (76 mm) at Seams. 3″ (76mm) 6 (96) 2 1 Layer 3 inch (76 mm) Compressed Butt Joints or Overlap Minimum 3 inches (76 mm) at Seams. 3″ (76mm) 6 (96) 2
CL4Fire is limited for use to Grease ducts of the following:
• Maximum Duct Size: 1296 in2 (8361 cm2)
• Maximum Width dimension of 92 cm (36 in) H x 92 cm (36 in) W. or
• Maximum Height dimension of 122 cm (48 in) H x 68 cm (27 in) W.
• Minimum duct gauge of 16 gauge (1.6 mm).
• Ducting is limited to rectangular, square or circular cross-section.
• Ducting is to conform to Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA) requirements.
• When used CL4Fire Code 96 should only be used in the outer wrap layer.
Product is to be installed per this listing.F405-1-4
For installation and further information please refer to the Listing Document Link at the top of the page
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