Hart Cooley 421-4x14 Golden Sand Floor Diffuser 4 Inches X 14 Inches 421 Series

Product Description

The Hart Cooley 421-4x14 is a Golden Sand floor diffuser designed for residential and light commercial HVAC supply air applications. It fits a wall opening of 4 inches x 14 inches and has an overall face size of 5-1/2 inches x 15-1/2 inches, making it a direct replacement for standard floor register openings of that dimension. HVAC technicians and installers rely on this diffuser to distribute conditioned air evenly across a room from floor-level duct openings. The 421 Series is a widely recognized product line from Hart Cooley, a trusted name in air distribution hardware used throughout the HVAC trade. This diffuser is built from heavy-gauge stamped steel with welded construction, giving it the structural strength needed to handle foot traffic without bending or flexing. The fins are rolled at the edges for added rigidity and to prevent sharp edges that could cause injury during installation or regular use. A multi-angle fin setting allows the installer or end user to direct airflow in the direction best suited to the room layout. The foot-operated dial control makes it easy to open, close, or partially restrict airflow without bending down, which is a practical feature for floor registers used daily. The enamel finish in Golden Sand provides a clean, neutral appearance that blends with common flooring materials including hardwood, tile, and carpet surround. This diffuser is fully steel construction, making it more durable than plastic alternatives. It is commonly used in new construction, remodel projects, and direct replacement installs where the existing duct collar matches the 4 by 14 inch opening size. HVAC supply registers, floor diffusers, and air distribution grilles in this size range are standard items in residential forced-air systems.

• All-steel welded construction with heavy-gauge stamped face for durability under foot traffic
• Multi-angle fin setting with rolled fin edges for adjustable airflow direction and safe handling
• Foot-operated dial control for easy open and close adjustment without bending

Product Highlights

The Hart Cooley 421-4x14 floor diffuser delivers reliable airflow control and long-term durability in a standard 4 inches x 14 inches floor register opening. Its all-steel build, adjustable fins, and foot-operated damper make it a practical choice for residential HVAC supply air installations.

Product Information

Standard Information

• Brand: HART COOLEY
• Manufacturer Part Number: 421-4x14

Technical Specifications

• Product Type: Supply Diffuser
• Series: 421
• Wall Opening Size: 4 inches x 14 inches
• Overall Size: 5-1/2 inches x 15-1/2 inches
• Height (Wall Opening): 4 inches
• Width (Wall Opening): 14 inches
• Color: Golden Sand
• Material: Steel
• Application: HVAC
• Finish: Enamel
• Damper Control: Foot-Operated Dial