28" x 34" or 34" x 28" Cube Core Eggcrate Return Air Grille with filter actual front end outer dimensions MFFG810-1 Product Details Size 20 Compatible with Duct 3"

actual front end outer dimensions are approximately 10 5/8" width X 34 5/8" height

our Round Air Vent Supply Grille is the perfect addition

Performance – High diffusion induction rates result in rapid temperature and velocity equalization of the mixed air mass well above the zone of occupancy

+ Product Details Size – 10" x 20" or 20" x 10" is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 16" Width X 10" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

28" x 34" or 34" x 28" Cube Core Eggcrate Return Air Grille with filter actual front end outer dimensions MFFG810 1 Product Details Size 20 Compatible with Duct 3" actual front end outer dimensions are approximately 10 5 8" width X 34 5 8" height our Round Air Vent Supply Grille is the perfect addition