16" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length 18" Diameter Its elegant look and fine

Its elegant look and fine finish and the natural warmth of oak wood

minimizing waste

1/2" White insulation will give you a good R value of 3

but you will appreciate the benefits over the period of time

With plain ends

16" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length 18" Diameter Its elegant look and fine+ Product Details High Quality Aluminum housing on the outside and on the inside for the best insulation value Insulation A thick blanket of fiberglass insulation provides you with an R Value of 4. 2 Energy Efficient Air tight inner core decreases the pressure loss and provides a more hygienic environment high energy efficient No fiberglass erosion into air stream Design Designed to withstand bends and sharp turns without kinking. Tough reinforced