Linus ProAir Linear Slot Diffuser Upgrade your commercial HVAC system with the Linus ProAir Linear Slot Diffuser—a precision-engineered, fully extruded aluminum air diffuser built for architects, engineers, and contractors who demand performance, durability, and a clean modern aesthetic. Whether you're specifying for a hospital, hotel, office buildout, or high-end commercial renovation, Linus ProAir delivers a truly commercial-grade product at a premium accessible price point. Available in 1, 2, and 3-slot configurations for floor, wall, and ceiling applications. Can be trimmed on-site up to 3-inches on either end for the perfect fit. 100% Extruded Aluminum Construction No steel, no plastic, no stamping, no casting. Pure North American-made extruded aluminum resists rust, corrosion, and moisture—critical for the humidity and airflow demands inside any HVAC system. At approximately 15% heavier than standard market alternatives, you can feel the quality difference the moment you handle i