Photo 1 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]

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Photo 1 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]Photo 2 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]Photo 3 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]Photo 4 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]Photo 5 of Handua 20"W x 20"H [Duct Opening Size] Filter Included Steel Return Air Filter Grille [Removable Door] for 1" Filters, Vent Cover Grill, White, Outer Dimensions: 22 5/8"W X 22 5/8"H for 20x20 Opening 20"W x 20"H [Duct Opening]