12 x 20 Merv 2 HVAC Pleated Filter, 12-Pack Color_Red Oak Wood + Product Details Size –

+ Product Details Size – 18"w X 32"h is the size for the duct opening measurement only

The total outer size of this grille is the listed size plus 1

actual front end outer dimensions are 11" width X 11" height

Superior Quality – Made in the USA

+ Product Details Size – 32"w X 25"h is the size for the duct opening measurement only

12 x 20 Merv 2 HVAC Pleated Filter, 12-Pack Color_Red Oak Wood + Product Details Size –The W shaped pleats enlarge the surface area for capturing dirt and particles for cleaner air Get 3 MERV 2 AC filters per pack while only paying for 2 Dimensions are interchangeable for rectangular filters, but not square ones Let air circulate and cycle through your HVAC without obstructions