26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
actual front end outer dimensions are 37
The 1/2" black insulation
+ Product Details Size - 18"w X 6"h is the size for the duct opening measurement only
Actual Filter Size – 29 3/4"w x 13 3/4" x 1"
+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 36" OR 36" x 20" duct opening (measured at the opening)
26" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter steel actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are 37 The 1 2" black insulation