14"w x 14"h (Duct opening size) steel filter return grille with removable door for 1-inch filter replacement - Overall dimensions: 16.6"w X 16.6"h

Kompell Aire Filter Return Grille listed size 14” wide and 14” tall is for the duct opening measurement. The grille has hinged face door for filter of same size with thickness of 1”. Overall outside dimension is 16.6” wide and 16.6” 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 2.6” 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 24" wide by 16" tall, buy a 24x16 grille; If the hole is 16" wide by 24" tall, buy a 16x24 grille.

• The Listed size 14"x14" is for inside duct opening measurement, actual outside dimension is 16.6"x16.6"
• Stamped Face Steel Construction with 1/2" fin spacing for high air flow
• Screws are included for easy installation
• White Powder coating with matte finish
• Individually packed with card board box for ultra protection