T/L-A - Triple Lock Acoustic Duct

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 a thick fiberglass insulation and covered by a flame retardant, non-toxic polyethylene vapour barrier.
This top-rated 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.