TRUaire C166-VPB 04X10 Polished Steel Floor Diffuser 4x10 in 1-Way Non-Adjustable The TRUaire C166-VPB 04X10 polished steel floor diffuser is a non-adjustable, one-way air grille engineered for efficient airflow in residential and light commercial HVAC applications. Featuring a bright polished steel finish and robust steel construction, it combines functional performance with a refined metallic aesthetic that complements modern, industrial, or transitional interiors. Designed to fit a standard 4" x 10" duct opening, the unit includes fixed louvers that direct air consistently without manual adjustment, ensuring reliable ventilation with zero maintenance. Its precision-formed frame and clean lines allow for seamless integration into finished floors, making it ideal for both new installations and upgrades where durability and visual appeal are essential. Features - Non-adjustable 1-way airflow design for consistent, directed air distribution - Polished steel finish offers a sleek, reflective surface for contemporary spaces - Constructed from durable steel for long-term structural integrity - Fits standard 4" x 10" duct openings with secure, flush mounting - Fixed louver pattern eliminates moving parts?no dampers to adjust or break - Low-profile design integrates smoothly with hardwood, tile, and carpet transitions - Ideal for supply or return applications in living rooms, offices, and hallways - Shrinkwrapped packaging ensures protection during shipping and storage - Not paintable?maintains factory-polished appearance - Coordinates with TRUaire?s architectural ventilation product line Specifications - Brand Name: TRUaire - Model Name: TRUaire C166-VPB 04X10 - Part Number: C166-VPB 04X10 - Product Type: Floor Diffuser - Material: Steel - Finish: Polished - Air Deflection: 1-Way - Adjustable: No - Paintable: No - Magnetic: No - Duct Opening Size: 4 x 10 in - Overall Dimensions: 4 in H x 10 in W x 2-11/16 in D - Packaging: Shrinkwrapped - Country of Origin: United States - Manufacturer: TRUaire - UPC: 803492202194 Product Application This polished steel floor diffuser is used by HVAC professionals, builders, and homeowners in finished interior spaces where both performance and design matter. It is commonly installed over supply or return ducts in living rooms, lobbies, home offices, and retail environments where the reflective finish enhances ambient lighting and modern decor. The fixed louver system ensures uninterrupted airflow without user intervention?ideal for areas where adjustable registers are unnecessary or prone to misuse. Its corrosion-resistant steel body withstands foot traffic and cleaning, making it suitable for high-visibility, high-function zones. By merging industrial-grade reliability with architectural polish, this diffuser delivers quiet, efficient ventilation and elevated visual detail in everyday comfort systems.