Air duct consisting of two aluminium polyester laminate encapsulating a galvanized steel wire helix, a fiberglass insulation blanket rated R4,2 and a triax fiberglass scrim reinforced black polyester vapor barrier.

Diameter : 4 to 18 inches
R FACTOR : R4,2
Meets c-UL-us standard : Air duct
Complies with NFPA : 90A & 90B

FCMI spec sheet