Z-FLEX 10" x 25 Ft. Fab 5-T Fabriflex Low Pressure Duct, R4.2 (Insulated)

An insulated, reinforced aluminized trilaminate flexible air duct; mechanically locked together by a corrosive resistant galvanized steel helix. The core is covered with GREENGUARD certified JM Formaldehyde-free™ thick fiberglass insulation, and sleeved by a flame retardant non toxic polyethylene vapor barrier.This ULC-S110 and UL-181 Class 1 Product, combined with a reinforced liner and thermal features, produce a duct assembly ideal for energy efficient HVAC installations. Pressure Rated: 10" w.g. positive 10" w.g. neg thru 12" dia. 5" w.g. neg 14" & 16" dia. 1" w.g. neg. 18" & 20" dia. Rated Velocity: 5500 F.P.M. Core: Trilaminate of Aluminum Foil, Fiberglass and Aluminized Polyester Vapour Barrier Permeance: .10 Perm A.S.T.M. Procedure A Connector Rated Note: This product is compressed by the manufacturer and then packaged for shipping purposes. To reach the specified length, the product needs to be unpackaged and stretched.