18″x 25′-R8 Insulated Silver Flex Duct

18″x 25′-R8 Insulated Silver Flex Duct, Boxed Atco #031 is UL 181, Class 1 Air duct and is manufactured with a tri-directional fiberglass scrim reinforced, metallized polyester outer jacket. The inter core of the product is air-tight and designed for low-to medium operating pressures in HVAC systems. Atco #031 has increased insulation for superior thermal performance. A double lamination of tough polyester which encapsulates a steel wire helix forms the air-tight inner core of Atco #031. The double-layer core of this product is wrapped in multiple thicknesses of fiberglass insulation.The duct is sheathed in a rugged and durable tri-directionally reinforced, metallized polyester jacket. FEATURES:

• Air-Tight Inner Core
• Encapsulated Wire Helix
• Smooth Inner Core
• Thick Blanket of Fiberglass Insulation
• Tough Reinforced Metallized Polyester Jacket
• Lightweight Compact Carton