28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling from 4" to 20"

from 4" to 20"

+ Product Details Size - 24"w X 28"h is the size for the duct opening measurement only

+ Product Details Size – 12"w X 26"h is the size for the duct opening measurement only

6"w X 6"h 3-Way Fixed Curved Blade Air Supply Diffuser - Vent Duct Cover - Grille Register - Sidewall or Cieling - High Airflow - White

this model ensures top-notch air quality

28" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter ceiling from 4" to 20"+ Product Details Perfect Fit & Easy Sizing Designed for a 28" x 16" OR 16" x 28" duct opening (measured at the opening), with actual outer dimensions of 30. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 27. 75" x 15. 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