Measure Duct Opening for Proper Fit: Designed for standard return air duct openings. Always measure the duct opening itself—not the outer frame of an existing grille—to ensure correct alignment and a secure installation. Sidewall & Ceiling Application: Engineered for versatile installation on both sidewalls and ceilings, making it suitable for residential and light commercial HVAC return air systems. Durable Steel Construction: Manufactured from high-quality steel to deliver long-lasting strength and reliability. Built to resist bending, warping, and everyday wear over time. Clean, Finished Appearance with Frame: Features a solid frame design that provides a polished, built-in look once installed, enhancing the overall appearance of your wall or ceiling vent area. Simple Installation & Easy Maintenance: Designed for quick installation with standard tools. Smooth surfaces allow for easy cleaning and long-term upkeep, helping maintain efficient airflow and a neat appearance.