12" x 24" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 11.75 X 23.75] 3-Pack ceiling + Product Details Size –

+ Product Details Size – 30"w X 16"h is the size for the duct opening measurement only

+ Product Details Size – 30"w X 18"h is the size for the duct opening measurement only

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

+ Product Details Size – 12" X 4" is the size for the duct opening (floor/vent hole) measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 24" OR 24" x 18" duct opening (measured at the opening)

12" x 24" Pleated MERV 8 Filter for HVAC Return Filter Grille [Actual Dimensions: 11.75 X 23.75] 3-Pack ceiling + Product Details Size –+ Product Details Size 12"w X 24"h pleated MERV 8 filter for HVAC return filter grille 3 Pack. Actual dimensions: 11. 75" X 23. 75" High Quality A uniquie combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system Design The "W" shaped pleats give you more filter surface thereby capturing more dust. Our metal and paper diagonal support bars ensure the filter can