Material ASTM-A653 CS Type B Galvanized Steel, G-30 Coating LFQ Chemical Treatment
Gauge 30GA
Assembly Ceiling boot assembled with C-115 2/16″ zinc coated steel rivets and has a rectangular opening. The collar is 3½” tall roll formed 30GA steel with 1/4″ roll formed beading.
Insulation Knauf Equipment Liner M with ECOSE® Technology Available Thickness: R4 – 1″, R6 – 1½”, & R8 – 2″
ASTM C 1071, Type I, Flexible (replaces obsolete Federal Specification HH-I-545B.) NFPA 90A/90B, ASTM C 665/1617 Temperature Range (ASTM C 411), Microbial Growth (ASTM C1338, G21)
Option 504D – with damper 504R6DBT – DB top without collar Available in 26GA upon request