Lambro Industries 143WP Under Eave Vent 4 Inch Plastic

Product Description

The LAMBRO INDUSTRIES 143WP is a 4-inch plastic under eave vent designed to terminate dryer exhaust, bath fan, or ventilation ductwork through a soffit or eave. The unit includes a built-in damper that closes when the fan is off, blocking wind, rain, insects, and other outside elements from entering the duct system. Constructed from plastic, this vent is lightweight and resistant to moisture-related corrosion, making it suitable for exterior installation in a range of residential applications. It is typically installed by HVAC technicians, plumbers, or general contractors during new construction or as a replacement on existing ventilation systems.

This vent is suited for residential installations where duct terminations are required at the soffit or eave line. Common applications include dryer venting, bathroom exhaust fan discharge, and HRV or ERV exhaust terminations. The 4-inch diameter fits the most common duct size used in residential exhaust ventilation. It is sold in a package of 6 units, making it practical for multi-unit jobs or stocking purposes.

Key Features

• 4-inch diameter fits standard residential exhaust duct
• Built-in damper closes when airflow stops to block outside elements
• Plastic construction resists moisture and corrosion in exterior applications
• Low-profile under eave design for soffit termination
• Sold in a package of 6 units per case

Compatibility

Designed as an OEM-style replacement or new-installation vent for 4-inch residential exhaust ductwork terminating at a soffit or eave.

Installation Notes

Installation is typically performed by HVAC technicians or qualified contractors following local mechanical codes and manufacturer guidelines. Shut down the connected fan or ventilation equipment before beginning work. Ensure the duct termination location provides adequate clearance from windows, doors, and gas appliance intakes as required by applicable codes. Seal around the vent collar with a weather-appropriate caulk to prevent water infiltration into the wall or soffit cavity.

Technical Specifications

• Diameter: 4 inches
• Material: Plastic
• Damper: Included
• Weight: 1.68 pounds
• Package Quantity: 6 units per package
• Unit of Measure: EA

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 143WP