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Triple Lock-Acoustic (TL/A) is an insulated acoustic air duct, manufactured by using a dead soft aluminum strip which is perforated, spirally wound and mechanically joined together.

The inner duct is draped with thick fiberglass insulation and covered by a flame retardant, scrim foil mylar vapour barrier.

This top-rated ULC-S110 and UL-181 Class 1 product uses a Triple Lock (T/L basic) perforated core with an open area of 20% to 25% to completely cushion sounds such as air movement and duct vibrations.

Pressure Rated:
  • 2" w.g. positive thru 16" Dia.
  • 1" w.g. positive, 10" Dia.

Rated Velocity:
  • 4000 F.P.M.

Vapour Barrier Permeance:
  • .05 Perm A.S.T.M. E96, Procedure A

Operating Temperature Range: -20°F to +250°F

Flame/Smoke: 25/50 UL 181 Class 0

Note: This product is compressed by the manufacturer and then packaged for shipping purposes. To reach the specified length, the product needs to be unpackaged and stretched.
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Manuals (1)
Diameter (Inches):




Length (Feet):




Operating Temp Range:

-20° to 250°F


Mylar Sleeve


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