18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter R value rating of insulation

R value rating of insulation - r3

Actual Filter Size – 35 3/4"w x 31 3/4" x 1"

+ Product Details Size – 14"w X 12"h is the size for the duct opening measurement only

The smooth

18" Insulated Aluminum Flexible HVAC Duct R-6.0 – 25' Length return filter R value rating of insulation+ 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 6. 0 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