28" X 24" Steel Return Air Filter Grille for 1" Filter - Removable Frame - [Outer Dimensions: 30 5/8" X 26 5/8"] with filter Actual Filter Size – 27 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
Actual Filter Size – 27 3/4"w x 35 3/4" x 1"
Filter Size - 23
but you will appreciate the benefits over the period of time
at predicted low air motion 35 fpm in the zone of occupancy
also called T-Bar systems
28" X 24" Steel Return Air Filter Grille for 1" Filter Removable Frame [Outer Dimensions: 30 5 8" X 26 5 8"] with filter Actual Filter Size – 27 4 X 12 Is CRFG2028 Width_14in Actual Filter Size – 27 3 4"w x 35 3 4" x 1" Filter Size 23