Builders Best 111392a 4 Inch Wide Mouth Plastic Vent Hood

Product Description

The BUILDERS BEST 111392a is a wide mouth plastic vent hood designed for exterior wall termination of residential ventilation systems. Molded from polypropylene, this 4-inch hood features a flush faceplate in brown finish and includes a snap-in 1/2-inch grid that acts as a bird guard. A free-swinging backdraft flapper prevents reverse airflow when the exhaust system is not operating. The hood ships with an aluminum trim plate and 11-inch tails for a clean finished appearance at the wall penetration. Installation requires no specialty tools and is suited to HVAC techs, plumbers, or experienced mechanical contractors handling dryer or bath exhaust terminations.

This hood is appropriate for residential dryer venting, bathroom exhaust, and general mechanical ventilation applications where a 4-inch wall termination is required. The wide mouth opening exceeds the pipe diameter to reduce static pressure at the point of exhaust. The snap-in grid is removable, which is required practice when the hood is used for dryer venting to prevent lint accumulation and fire hazard. The flush faceplate sits flat against exterior siding or masonry for a clean, low-profile finish. Always verify compliance with local building codes before installation.

Key Features

• Free-swinging backdraft flapper prevents reverse airflow when system is idle
• Snap-in 1/2-inch bird guard grid is removable for cleaning or dryer-venting applications
• Wide mouth opening exceeds 4-inch pipe diameter to reduce exhaust restriction
• Polypropylene construction resists moisture and UV degradation at exterior wall penetrations
• Includes aluminum trim plate and 11-inch tails for a finished wall installation
• Flush faceplate design in brown finish suits common exterior siding profiles

Compatibility

Designed as an OEM-style replacement or new-installation termination hood for 4-inch residential exhaust duct systems including dryer venting and bath fan exhaust.

Installation Notes

Installation is typically performed by a licensed HVAC technician, plumber, or mechanical contractor. Shut off the connected appliance and de-energize any associated electrical circuits before cutting the wall penetration or connecting ductwork. Remove the snap-in grid before use in dryer venting applications, per manufacturer instructions and most local mechanical codes. Check the grid regularly for lint, debris, and blockages regardless of application, and verify all work against local building and mechanical codes before closing up the wall.

Technical Specifications

• Material: Polypropylene molded plastic
• Duct Diameter: 4 inches
• Grid Size: 1/2 inch snap-in, removable
• Trim Plate: Aluminum, included
• Tail Length: 11 inches
• Faceplate Style: Flush
• Color: Brown
• Unit of Measure: Each

Standard Information

• Brand: BUILDERS BEST
• Manufacturer Part Number: 111392a