Description
+ Product Details Size – 12"w X 12"h is the size for the duct opening measurement only
Actual Filter Size – 23 3/4"w x 11 3/4" x 1"
+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 30" OR 30" x 20" duct opening (measured at the opening)
+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 36" OR 36" x 20" duct opening (measured at the opening)
Design – Rigid gauge built for durability and long life in mind
32" x 6" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w22h22 + Product Details Size –Strong aluminum frame & cube core that never rusts Rigid design with noise free components quiet airflow Cubic core eggcrate design has the highest rate of airflow efficiency