3½” Tall with Bottom Flanged

Material
ASTM-A653 CS Type B Galvanized Steel – 30GA, 14×14 and above 28GA G-30 Coating LFG Chemical Treatment

Assembly
Ceiling boot assembled with C-115 2/16 zinc coated steel rivets, has a rectangular opening with a 1″ 90 deg outboard flange and 1/2″ drywall flange

Insulation
Knauf Eclipse® Air Duct Board with ECOSE® Technology – rigid fiber glass board on one side with a foil-scrim-kraft(FSK) vapor retarder and a lightweight black fiber glass mat on the airstream surface. ASTM C1136; Type II (FSK facing), ASTM G 21, C 411, UL 181, ASTM C 665, NFPA 90A & 90B.

Knauf Equipment Liner M with ECOSE® Technology Available Thickness: R6 – 1½”

ASTM C 1071, Type I, Flexible (replaces obsolete Federal Spec HH-I-545B.) NFPA 90A/90B, ASTM C 665/1617, Temp Range ASTM C 411, Microbial Growth (ASTM C 1338, G 21)