Unico 20A75 Twist-Fit Sound Attenuator Supply Air Tubing, model UPC-26TC-1, is engineered to reduce airflow noise while maintaining efficient performance in high-velocity HVAC systems. This 2-inch inside diameter supply tubing measures 12 feet in length and features an R-3.3 insulation rating, helping to minimize sound transmission and radiant heat loss in residential and light commercial applications.

The tubing is constructed with a durable spun-bound nylon inner core for smooth airflow and long-term reliability. A two-ply reinforced reflective Mylar outer jacket provides an effective vapor seal to prevent air leakage and moisture migration, while also improving insulation efficiency by reducing radiant heat transfer. A fiberglass blanket insulation fills the space between the core and jacket, delivering consistent acoustic and thermal performance.

Designed as part of the Twist-Fit series, this sound attenuator tubing allows for fast, secure installation and can be cut to length as needed for flexible field applications. Supplied boxed for protection during transport, this Unico supply tubing is ideal for use in sound-sensitive installations where quieter system operation is a priority.