14" x 32" or 32" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe Superior Airflow Control: Built-in damper

Superior Airflow Control: Built-in damper lets you control how much air enters your room

+ Product Details Size – 14" x 20" or 20" x 14" is the size for the duct opening measurement only

Design – These Supply Diffusers with integral round necks are recommended for heating

Ideal for Walls & Ceilings: Designed for seamless installation in standard 16" X 8" duct openings

+ Product Details Size - 25"w X 10"h is the size for the duct opening measurement only

14" x 32" or 32" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter 14" Round Duct Pipe Superior Airflow Control: Built-in damper+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 32" OR 32" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 34. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 31. 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