Aluminum Triple Lock T/L Flexible Duct by Flexmaster
Semi rigid, lightweight, non-insulated, 1 ply aluminum duct. Available in 2", 3", 4", 5" and 6" diameters and 50 foot lengths.
Use for fresh air intake only. Do not use as a chimney liner. For that, use flexible stainless steel gas liner.
To fasten different 3" aluminum duct sections, order the 7HS44XX 3" gear clamps shown in the blue Related Gadgets tab above.
Triple Lock T/L system by Flexmaster is a lightweight, semi-rigid, non-insulated air duct. It's made using a dead soft aluminum strip which is spirally wound and mechanically joined together. This forms an air-tight and leakproof three-ply mechanical seam. It is self-supporting and corrosive resistant. With its ULC-S110 and UL-181 Class 1 rating, it provides excellent strength and flexibility. It is adaptable to any heating, ventilation and air conditioning system, even with high-pressure.
Maximum Rated Velocity: 20.3 m/s (4000 fpm)
Maximum Positive Pressure: 3kPa (12 in. WC)
Maximum Negative Pressure: 0.25 kPa (1 in. WC)
Temperature Range: -40°F to +600°F ( -40°C to +316°C )
Bend Radius: 1.5 x diameter
Available Sizes: 2” to 24”
Standard Lengths" 10 feet
ULC Listing: Class 1 Connector
Warranty: Limited Lifetime