32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille R value rating of insulation

R value rating of insulation - r3

+ Product Description Protect and secure your thermostat with this high-quality Clear Plastic Thermostat Guard

actual front end outer dimensions are 15

85" width X 9

Installation Location – Sidewall and ceiling

32" x 28" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Filter Grille R value rating of insulation+ Product Details Perfect Fit & Easy Sizing Designed for a 32" x 28" OR 28" x 32" duct opening (measured at the opening), with actual outer dimensions of 34. 5" W x 30. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 31. 75" x 27. 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