28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 28 5/8" height

+ Product Details Size - 22"w X 24"h is the size for the duct opening measurement only

14" x 8" Decorative Wood Air Vent HVAC Duct Cover Grille - Polished Finish Red Oak Wood - 2-Way Air Direction

making it ideal for preventing tampering or unauthorized adjustments

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28" x 30" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible with Duct 10" actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 30" OR 30" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 29. 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