Lambro Industries 313W Aluminum Dryer Vent Kit 4x8

Product Description

The LAMBRO INDUSTRIES 313W is a semi-rigid aluminum dryer vent kit designed for residential and light-commercial dryer exhaust installations where building codes mandate all-aluminum ductwork. The kit includes semi-rigid aluminum duct and a wall cap with opening and closing flaps that block outside air, pests, and moisture from entering the vent when the dryer is not running. The duct is fully non-combustible and rated for a maximum operating temperature of 400 degrees F, making it suitable for compliance with fire and building code requirements. A UV inhibitor is incorporated into the wall cap to resist fading from sun exposure over time.

This kit is intended for 4-inch dryer exhaust applications in residential laundry rooms or utility spaces. It is used when local building codes or inspection requirements prohibit flexible foil or vinyl duct and require rigid or semi-rigid aluminum throughout the entire exhaust run. The semi-rigid construction allows for minor bends during routing while maintaining a smooth interior surface that reduces lint accumulation compared to corrugated flexible duct. Licensed HVAC technicians, plumbers, and general contractors commonly install this product during new construction, remodels, or dryer exhaust upgrades.

Key Features

• Fully non-combustible semi-rigid aluminum construction meets code requirements for all-aluminum dryer exhaust systems
• Rated for continuous use up to 400 degrees F operating temperature
• Wall cap flaps open during dryer operation and close at rest to block outside air, insects, and debris
• UV inhibitor in the wall cap helps prevent premature fading from sun and weather exposure
• 4-inch diameter duct fits standard residential dryer exhaust outlets

Compatibility

Designed as an OEM-style replacement and new-installation dryer vent kit for standard 4-inch residential dryer exhaust systems requiring all-aluminum semi-rigid ductwork per local building code.

Installation Notes

Installation should be performed by a qualified HVAC technician or contractor in accordance with applicable local building codes and the dryer manufacturer's installation instructions. Disconnect the dryer from power or gas before connecting or disconnecting any ductwork. Secure all duct joints with metal foil tape rated for dryer exhaust use — do not use sheet-metal screws inside the duct or standard duct tape. Confirm the wall cap termination location maintains required clearances from windows, doors, and gas meters per local code.

Technical Specifications

• Duct Diameter: 4 inches
• Duct Length: 8 feet
• Material: Aluminum (semi-rigid)
• Maximum Operating Temperature: 400 degrees F
• Combustibility: Non-combustible
• UV Inhibitor: Yes
• Weight: 1.9 pounds
• Package Quantity: 1

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 313W