34" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 7 3/4" x 1"

+ Product Details Size - 14"w X 24"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 32 5/8" width X 18 5/8" height

4" X 14" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

+ Product Details Size – 28"w X 22"h is the size for the duct opening measurement only

34" x 34" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Return Actual Filter Size – 25+ Product Details Perfect Fit & Easy Sizing Designed for a 34" x 34" duct opening (measured at the opening), with actual outer dimensions of 36. 5" W x 36. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 33. 75" x 33. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum Made from