14" x 22" or 22" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar + Product Details Size -

+ Product Details Size - 36"w X 34"h is the size for the duct opening measurement only

+ Product Description Elevate your space with our Aluminum Ceiling Diffuser

The 1/2" black insulation

even without needing to remove the thermostat

+ Product Details Perfect Fit & Easy Sizing - Designed for a 14" x 14" duct opening (measured at the opening)

14" x 22" or 22" x 14" Cube Core Eggcrate Return Air Filter Grille for 1" Filter fixed bar + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 14" x 22" OR 22" X 14" duct opening (measured at the opening), with actual outer dimensions of 16. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 13. 75" x 21. 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