HBW 14"x20" Stamped Face Steel Return Grille Vent Cover White Poweder Coating Without Frame Outside Dimension 15.75"x21.75"

HBW Return Grille listed size 14” wide and 20” tall is for the duct opening measurement. Overall outside dimension is 15.75” wide and 21.75” tall. Difference Between grilles, registers, diffusers and vents：Grille – a series of deflectors in the shape of blades or fins fixed in a frame to allow air to pass through from duct to room space or from room to outside via ductRegister – a grille attached with a damper or valve to control the air flow volumeDiffuser – a unit with duct connecting piece and a larger face piece with multiple blades to spread out air flow to multiple directions. Examples are drop ceiling T-bar diffusers and round ceiling diffusers.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 14" wide by 20" tall, buy a 14 x 20 grille; If the hole is 20" wide by 14" tall, buy a 20 x 14 grille.

• The Listed size 14"x20" is for inside duct opening measurement, actual outside dimension is 15.75"x21.75"
• 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