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Filter Size - 33
Actual Filter Size – 27 3/4"w x 27 3/4" x 1"
+ Product Details Size – 14" x 24" or 24" x 14" is the size for the duct opening measurement only
Ring Base Design – Allows for easy installation without removing the thermostat
this grille boasts a natural warmth and fine finish
20" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter sidewall Filter Size - 33+ Product Details Perfect Fit & Easy Sizing Designed for a 20" x 14" OR 14" x 20" duct opening (measured at the opening), with actual outer dimensions of 22. 5" W x 16. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 19. 75" x 13. 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