Construction Materials
The air duct is made entirely of aluminum that is
twisted to form a continuous airtight lock-seam.

Operating Pressure (inches water column)
Positive = 6 inches H²O (1.5 kPa)
Negative = 6 inches H²O (1.5 kPa)

Operating Temperature Range
Minimum = -20°F (-28°C)
Maximum = 435°F (224°C)

Velocity (feet per minute)
5,000 f.p.m. (25 m/sec)

Surface Burning Characteristics
Maximum Flame Spread = 0
Maximum Smoke Development = 0

Available Diameters
3, 4, 5, 6, 7, 8

Available Lengths
10 feet