20" X 25" Or 25" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 26.75] Drop Ceilings / Aluminum at predicted low air motion

at predicted low air motion 35 fpm in the zone of occupancy

+ Product Details Size & Compatibility – The size of sheet metal pipe is 4" round x 24"long

making it an essential gear for your toolkit

actual front end outer dimensions are approximately 32 5/8" width X 34 5/8" height

With our replacement air filters

20" X 25" Or 25" X 20" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 21.75 X 26.75] Drop Ceilings / Aluminum at predicted low air motion+ Product Details Size 20"w X 25"h o 25" x 20" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21. 75" width X 26. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation. Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully