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Atco #070, 076, and 078 are UL 181, Class 1 Air Ducts and are manufactured with a tri-directional fiberglass scrim reinforced, grey polyester outer jacket. The inner core of all three products is air-tight and designed for low-to-medium operating pressures in HVAC systems. Atco #076 and 078 have increased insulation for superior thermal performance.
Atco Insulated Air Duct, Double-Ply Flexible, Series: 70 Series, 4 in Inside Dia, 25 ft Length, 5000 fpm, 0.6 perms Vapor Transmission, 10 in WG, Polyester Jacket, Gray, Domestic
- Air-tight inner core - energy efficient/no fiberglass erosion into air stream
- Encapsulated wire helix - no unraveling when cut to length/quick installation
- Smooth inner core - low friction loss, low operating cost
- Thick blanket of fiberglass insulation energy efficient/excellent thermal characteristics
- Tough reinforced grey polyester jacket - tear and puncture resistant/low maintenance
- Maximum operating temperatures: -20 to 140 deg F continuous (at maximum pressure), -20 to 180 deg F continuous (at 2 in pos WG max), -20 to 250 deg F intermittent (at 1/2 in pos WG max)
- 4 thru 12 in dia 6 in WG maximum positive pressure, 14 thru 22 in dia 4 in WG maximum positive pressure
- 3/4 in WG maximum negative pressure
- R-Value 4.2
- End treatment: 25 ft plain ends
- Flame spread: 25 maximum
- Smoke developed: 50 maximum
- Metallized polyester vapor barrier with tri-directional reinforcements
- Diameter4 inDomestic / ImportDomesticFlow Rate5000 fpmLength25 ftMaterialPolyester JacketFinishGrayManufacturerAtco Rubber ProductsManufacturer #17002504Series70 SeriesTypeDouble-Ply FlexibleVapor Transmission0.6 perms