24" X 24" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 25.75 X 25.75] 7" Diameter Insulation – A thick blanket 4 X 12 Is CRFG2028 Width_14in

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 6

+ Product Details Size – 28"w X 20"h is the size for the duct opening measurement only

effectively trapping more harmful particles and allergens

The end is crimped to connect consecutive

+ Product Details Size - 8"w X 14"h is the size for the duct opening measurement only

24" X 24" Heavy Duty Floor Grille Fixed Blades Air Grille Brown [Outer Dimensions: 25.75 X 25.75] 7" Diameter Insulation – A thick blanket 4 X 12 Is CRFG2028 Width_14in Insulation – A thick blanket of fiberglass insulation provides you with an R Value of 6 + Product Details Size – 28"w X 20"h is the size for the duct opening measurement only