12 x 6 Merv 2 HVAC Pleated Filter, 12-Pack return grille + Product Details Size -

+ Product Details Size - 18"w X 20"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 28" OR 28" x 22" duct opening (measured at the opening)

2" X 12" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

Installation requires cutting into the frame of your wall and the metal duct where your HVAC system is located

Experience improved airflow dynamics and reduced noise thanks to its long neck body design

12 x 6 Merv 2 HVAC Pleated Filter, 12-Pack return grille + 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