36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers Noise free components - no

Noise free components - no vibrating louvers etc

actual front end outer dimensions are approximately 28 5/8" width X 34 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 16" OR 16" x 30" duct opening (measured at the opening)

Actual Filter Size – 9 3/4"w x 33 3/4" x 1"

+ Product Details Size – 22"w X 24"h is the size for the duct opening measurement only

36" x 16" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Outdoor Vent Covers Noise free components - no+ Product Details Perfect Fit & Easy Sizing Designed for a 36" x 16" OR 16" x 36" duct opening (measured at the opening), with actual outer dimensions of 38. 5" W x 18. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 35. 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