12" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Black Every grille has a front

Every grille has a front end frame that will overlap at the wall joint

heat pump systems

Conveniently taped together as a single piece

but still light and handy

Slots are angled to diversify the airflow in 2 way direction

12" Insulated Aluminum Flexible HVAC Duct R-4.2 – 25' Length Black Every grille has a front+ 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