*KeyFeatures *How to Measure: Before installation, measure the wall opening to determine the correct size to order. Wall opening size equals the listed dimensions. For example, if the pipe opening on the wall is 20 inches wide by 20 inches high, please order the 20 x 20 size option. *Efficient Airflow: This wall return air grille provides a quiet and efficient ventilation experience for your heating and cooling system. The angled fin design maximizes airflow, ensures quiet operation, and further improves air cleanliness. For optimal performance, it is recommended to regularly clean or replace the blades. *Rust-resistant and Durable: Made from high-strength steel, this return air grille withstands pressure and scratches. The steel stamping process ensures no sharp edges, and the rust-resistant powder coating avoids chipping, scratching, and fading. Its built to handle tough environments and temperature changes. *Easy to Replace & Maintain: Includes screws for quick installation in 4 steps to enhance ventilation. The flip-open design allows for easy cleaning and replacement, with hidden hinges suitable for ceiling installation. You can also purchase compatible air filters separately for simultaneous ventilation and air purification. *Versatile Application: With its stylish and minimalist design, this return grille complements various interior styles. Its ideal for living rooms, offices, kitchens, bathrooms, and malls, enhancing airflow when used with heaters, air conditioners, or combined systems in both residential and commercial environments ******************************************************************************************************* *Specifications Item Model Number: 1RAF2020F-1 Installation Opening Dimensions: 19.9 x 19.9 in / 50.5 x 50.5 cm Installation Opening Thickness: 1.06 in / 2.7 cm Filter Rating: MERV8 Filter Slot Dimensions: 19.8 x 19.8 x 1.3 in / 50.3 x 50.3 x 3.2 cm Net Weight: 6.06 lbs / 2.75 kg Product Dimensions: 22.6 x 22.6 x 1.6 in / 57.5 x 57.5 x 4 cm ******************************************************************************************************* *Pakcage Content 1 x User Manual 4 x Cross Head Screws (M4 x 50) 1 x Vent Mounting Base 1 x Grille 1 x Filter