28" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Size -

+ Product Details Size - 14"w X 22"h is the size for the duct opening measurement only

+ Product Details Size - 22"w X 12"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 36 5/8" width X 14 5/8" height

This thoughtful design ensures optimal air circulation for your HVAC system

This Thermostat from Bramec will fit almost any thermostat

28" x 26" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers + Product Details Size -+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 26" OR 26" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 28. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 25. 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