18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille RG66 Black-HP actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 32 5/8" height

+ Product Details Size – 20" x 24" or 24" x 20" is the size for the duct opening measurement only

And The Cooler Air From Outside WIll Flow In From The Bottom

actual front end outer dimensions are approximately 23

This 16" X 12" end cap is constructed with 26-gauge galvanized steel

18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille RG66 Black-HP actual front end outer dimensions18" x 22" Pleated MERV 8 Filter for HVAC Return Filter Grille Actual Dimensions: 17. 75" X 21. 75" 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 The "W" Shaped Pleats Give You More Filter Surface Thereby Capturing More Dust All Our Filter Are Tested Per ASHRAE 52. 2 Standards MERV 8 And An Average Arrestance Of 90 94% Extra Strong Frame Our