| Connection Type | : | Twist-Fit |
| Diameter | : | 3-1/2 in |
| Domestic/Import | : | Domestic |
| Duct Size | : | 2 in |
| Length | : | 25 ft |
| Material | : | Aluminum |
| R-Value | : | R-4 |
| Vent Duct Shape | : | Round |
This is our aluminum flexible air duct 2 in Dia inside 3-1/2 in Dia outside insulated to R3.3 with one vapor barrier. They come in a box quantity of 4 to 25 ft length with our twist-fit connector on each end.
The Unico System® Flexible Supply Duct, 2 in Duct, Round Vent Duct, 25 ft Length, 3-1/2 in Diameter, Aluminum, R-Value: R-4, Twist-Fit Connection, Domestic/Import: Domestic
- The inner core layer of the tubing is either, 2 ply corrugated aluminum or spun bound nylon
- The outer jacket for all is made of a 2 ply reinforced reflective Mylar, providing a vapor seal to prevent leakage and moisture migration and increases the insulation factor by reducing the radiant heat transfer
- A fiberglass blanket insulation then fills the void between the jacket and the core