Hart Cooley 421-4x8w Floor Register with Opposed Blade Damper 4x8 Inches Bright White Enamel Steel

Product Description

The Hart Cooley 421-4x8w is a steel floor register designed for residential and light commercial HVAC installations where reliable airflow control and a clean finished look are required. This unit fits a 4 x 8 inch duct opening and is part of Hart Cooley's 421 Series, a line trusted by HVAC installers and contractors for consistent performance and easy installation. The register features an opposed blade damper that allows the user to adjust or fully restrict airflow directly at the floor level, giving occupants simple control over room temperature distribution without accessing the duct system. The opposed blade design ensures even airflow across the face of the register rather than directing air to one side, which supports better comfort and more even heating or cooling in the room. The register is constructed from steel and finished in a bright white enamel coating that blends with standard trim and flooring in most residential settings. The duct opening measures 4 inches by 8 inches, with a duct width of 7 and 5 eighths inches and a duct height of 3 and 3 quarters inches. The overall width of the face plate is 9 and a half inches, providing adequate overlap around the duct cutout to conceal rough edges in the floor. The overall depth is 1 and a half inches when the damper is closed and 2 and a quarter inches when fully open. Airflow capacity ranges from 40 to 130 CFM, making it suitable for standard residential supply runs. The effective area is 0.13 square feet. This is a domestically produced register, which is a common specification requirement on commercial and government projects. HVAC technicians, installers, and general contractors working on forced air systems will find this register straightforward to drop in and adjust on the job site.

• Opposed blade damper allows direct airflow adjustment at the floor register without duct access
• Steel construction with bright white enamel finish for durability and a clean appearance
• Fits 4 x 8 inch duct openings with a 9 and a half inch overall face width for full coverage of the cutout

Product Highlights

The Hart Cooley 421-4x8w delivers dependable airflow control and a professional finish for standard residential floor supply duct openings. Its opposed blade damper and steel build make it a practical choice for HVAC installers working on new construction or replacement projects.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 421-4x8w

Technical Specifications

• Series: 421
• Size: 4 x 8 inches
• Duct Width: 7 and 5 eighths inches
• Duct Height: 3 and 3 quarters inches
• Overall Width: 9 and a half inches
• Overall Depth: 1 and a half inches closed, 2 and a quarter inches open
• Flow Rate: 40 to 130 CFM
• Effective Area: 0.13 square feet
• Material: Steel
• Finish: Bright White Enamel
• Origin: Domestic