4" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Floor Grille + Product Details Size –

+ Product Details Size – 16" x 16" is the size for the duct opening measurement only

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With HVAC Premium you get an extra measure of quality that will be visible to your family members and house guests

Produced in accordance with ISO 9001-2008 Quality Management System

+ Product Details Size – 20"w X 10"h is the size for the duct opening measurement only

4" Insulated Aluminum Flexible HVAC Duct R-8.0 – 25' Length Floor Grille + Product Details Size –+ 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 8. 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