TRUaire C118SW 3-Way Baseboard Diffuser 4-1/2" H X 18" W Steel Powder Coat White Deliver balanced, efficient airflow with the Tru Aire C118SW Baseboard Diffuser, a durable 18-inch wide ventilation grille designed for use with baseboard heating and cooling systems. Constructed from high-quality steel with a smooth, white powder coat finish, this diffuser offers excellent corrosion resistance and a clean, professional appearance that blends seamlessly into any room. Measuring 4-1/2 inches in height and 18 inches in width, it fits standard baseboard enclosures and provides 3-way air deflection to distribute air horizontally and vertically for improved temperature control and comfort. The diffuser features a built-in Smooth-Glide damper that allows for precise manual adjustment of airflow, enabling you to control the volume of air entering the space without the need for additional tools. The 3-way directional vanes guide air in multiple directions to minimize drafts and reduce noise, promoting even heating or cooling throughout the room. Its robust steel construction ensures long-term durability, while the non-magnetic, non-paintable surface maintains its finish over time with no chipping or peeling. Designed for easy installation and long-lasting performance, the C118SW is ideal for residential and light commercial applications. The diffuser mounts directly into baseboard enclosures and is compatible with most standard ducted baseboard systems. It comes fully assembled and ready to install, with no field painting or finishing required. The shrinkwrapped packaging ensures the unit arrives clean and protected, ready for immediate use on the job site. Features - 18-inch baseboard diffuser with 3-way air deflection for optimal airflow distribution - 4-1/2 in H x 18 in W size fits standard baseboard heating and cooling units - Durable steel construction with white powder coat finish for lasting appearance - Powder coat resists chipping, scratching, and corrosion - Smooth-Glide damper allows for easy manual airflow adjustment - 3-way directional vanes direct air horizontally and vertically to reduce drafts - Non-magnetic and non-paintable surface maintains finish integrity - Fixed design?vanes are not adjustable beyond factory positioning - Suitable for use with hot water, steam, and forced-air baseboard systems - Provides quiet, even air delivery for improved comfort - Ideal for residential, office, and hospitality environments - Easy to install?no field modifications required Specifications - Brand Name: Tru Aire - Part Number: C118SW - Product Type: Baseboard Diffuser - Air Deflection: 3-Way - Height: 4-1/2 in - Width: 18 in - Depth: 2-3/4 in - Material: Steel - Finish: Powder Coat - Color: White - Adjustable: No (vanes fixed, damper adjustable) - Magnetic: No - Paintable: No - Damper Type: Smooth-Glide manual damper - Mounting Type: Baseboard integrated - Packaging Type: Shrinkwrapped - Each Weight: 2.040 lb - Manufacturer: Tru Aire - ECCN: EAR99 Product Application The Tru Aire C118SW Baseboard Diffuser is engineered for use in homes, apartments, hotels, and offices where quiet, efficient air distribution is essential. It is commonly installed in baseboard heating and cooling units to provide consistent airflow while maintaining a low-profile, unobtrusive appearance. The 3-way air deflection helps eliminate cold spots and improves thermal comfort, making it ideal for perimeter heating applications. Its durable construction and corrosion-resistant finish make it suitable for both new construction and retrofit projects. Whether used in bedrooms, hallways, or perimeter zones, this diffuser delivers reliable performance, easy maintenance, and professional-quality results in any forced-air or hydronic baseboard system.