Builders Best 110284a Wide Mouth Vent Hood 4 Inches

Product Description

The BUILDERS BEST 110284a is a plastic wide mouth vent hood designed for dryer exhaust and ventilation termination applications. Finished in brown, it ships fully assembled with a riveted 11-inch tailpipe, a back plate, and a built-in back-draft flapper. The back-draft flapper closes when the appliance is not running, blocking outside air, pests, and debris from entering the duct system. HVAC technicians and installers use this hood as the exterior termination point for 4-inch round duct runs on residential dryer vents and similar low-pressure exhaust systems.

This vent hood is suited for residential installations where a 4-inch exhaust duct penetrates an exterior wall. The wide mouth profile promotes smooth airflow and reduces lint buildup at the termination point. The brown finish blends with common exterior siding colors. Because it arrives fully assembled with the tailpipe already riveted in place, field installation is straightforward and does not require separate component assembly on the job.

Key Features

• Fully assembled at the factory with riveted 11-inch tailpipe — no field assembly required
• Integrated back-draft flapper prevents reverse airflow, pests, and debris intrusion
• Wide mouth profile supports efficient exhaust flow and reduced lint accumulation
• Includes back plate for clean wall penetration finish
• Brown color finish suits common exterior siding and trim
• Fits 4-inch round duct connections

Compatibility

Designed as an OEM-style replacement or new-installation vent hood for residential 4-inch round exhaust duct terminations, including dryer vents and similar low-pressure ventilation systems.

Installation Notes

Installation is typically performed by an HVAC technician or general contractor as part of a dryer vent or exhaust duct system. Shut off the appliance and disconnect power before connecting ductwork. Seal the wall penetration around the back plate with exterior-grade caulk to prevent air and moisture infiltration. Verify local mechanical codes and manufacturer duct-length requirements before finalizing the installation.

Technical Specifications

• Duct Size: 4 inches
• Tailpipe Length: 11 inches
• Material: Plastic
• Color: Brown
• Assembly: Fully assembled
• Unit of Measure: Each

Standard Information

• Brand: BUILDERS BEST
• Manufacturer Part Number: 110284a