Lambro Industries 1422W Single Flap Louver Vent 4 Inches

Product Description

The LAMBRO INDUSTRIES 1422W is a 4-inch single flap louver vent constructed from white plastic. It is designed to terminate dryer exhaust ducts, bathroom exhaust fans, or similar 4-inch round duct systems at an exterior wall. The single flap opens under positive airflow and closes by gravity when the system is off, limiting backdraft and pest entry. HVAC technicians, plumbers, and general contractors typically install this fitting as part of residential ventilation rough-in or replacement service.

This louver vent suits residential applications where a 4-inch round duct penetrates an exterior wall or soffit. Common installations include dryer vent terminations, bath fan exhaust terminations, and kitchen exhaust outlets. The white finish blends with standard trim and siding. It is sold in cases of 16 units, making it a practical stocking item for contractors managing multiple jobs or service calls that routinely require vent termination hardware.

Key Features

• Single gravity-close flap reduces backdraft when the exhaust system is idle
• 4-inch opening matches standard residential exhaust duct sizing
• White plastic construction resists moisture and corrosion at exterior termination points
• Lightweight design simplifies handling and positioning during wall penetration installs
• Packaged in quantities of 16 units per case for contractor convenience

Compatibility

Designed as an OEM-style replacement or new-installation louver vent for residential 4-inch round exhaust duct terminations, including dryer and bath fan applications.

Installation Notes

Installation is typically performed by HVAC technicians or general contractors following local mechanical code requirements. Power down or unplug the connected exhaust appliance before cutting the wall penetration or disconnecting existing ductwork. Seal the flange perimeter with appropriate exterior caulk to prevent water intrusion. Verify that the duct run length and number of elbows comply with the appliance manufacturer guidelines and applicable mechanical codes before completing the termination.

Technical Specifications

• Duct Diameter: 4 inches
• Material: Plastic
• Color: White
• Flap Style: Single flap
• Weight: 3.36 pounds
• Package Quantity: 16 units per case
• Unit of Measure: EA

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 1422W