18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 text-align: left

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+ Product Description The Clear Plastic Thermostat Guard is designed to provide secure protection for your thermostat while maintaining an attractive

Actual Filter Size – 15 3/4"w x 25 3/4" x 1"

We carry sizes the big box stores don't

commercial

18" x 30" or 30" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter w18h18 text-align: left+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 30" OR 30" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 32. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 29. 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