Fits 20x8 Duct Opening Stamped Steel Return Air Grille Vent Cover Grille for Sidewall and Ceiling in White Surface Dimensions: 21.75"W X 9.75"H (20" W x 8" H Duct Opening)

Kompell Aire Return Grille listed size 20” wide and 8” tall is for the duct opening measurement. Surface outside dimension is 21.75” wide and 9.75” tall. Size Selection GuideMeasure the size of the air duct opening(the size of the “hole” ). Select the listed size that match the duct opening size.The outside or overall size is 1.75” larger for both width and length so it can cover the “hole”.Do not use outside measurement for size selection or it would be too bit to fit.Width vs HeightThe first measurement in a return grille size is the width(horizontal measurement), the second measurement) is the height(vertical measurement). For example: if the hole on the wall is 20" wide by 8" tall, buy a 20x8 grille; If the hole is 8" wide by 20" tall, buy a 8x20 grille.

• The Listed size 20"x8" is for inside duct opening measurement, actual outside dimension is 21.75"x9.75"
• Stamped Face Steel Construction with 1/2" fin spacing for high air flowapplications.
• Screws are included for easy installation
• White Powder coating with matte finish
• Individually packed with cardboard box for ultra protection