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Rugged all metal inner core construction
Non-combustible/puncture-resistant
Semi-rigid yet flexible - easily shaped into bends, maintains shape/will not sag between supports
Lightweight compact cartons - reduces warehouse/jobsite handling costs and is easily stored
One end crimped/one end plain - lengths easily connected to terminal devices or other ducts
All thermal performance (R-values) are classified by Underwriters Laboratories in accordance with ADC flexible duct Performance and installation standard (1991) using ASTM C-518 (1991), at installed wall thickness, on flat insulation only.
Atco 2070805 General Purpose Venting Duct, 5 in Dia, 8 ft L, Aluminum