American Schools and Hospital Facilities Product Directory|California Bureau of Home Furnishing Most Federal|CHPS|GreenGuard Children and Schools and Level 4 "Highly Microbial Resistant" Rated|HUD|IMC|NFPA 90A and 90B|State and Local Codes and Standards|UL Listed UL 181|UMC

• 2 ply of black polyester film encapsulate a steel wire helix 2 ply black polyester core Rated pressures (UL-181): 12 in-WC positive, 3/4 in-WC negative R-4.2 Formaldehyde-Free™ insulation certified by UL and the air diffusion council in accordance with ADC flexible duct performance and installation standards using ASTM C-518 at installed wall thickness on flat insulation only This metalized vapor barrier is constructed using fiberglass scrim which provides an outstanding combination of strength and tear resistance Perm rating of 0.04 perms when measured per ASTM E96, method A Plain ends Packaged in box Surface burning characteristics flame spread less than 25, smoke developed less than 50