Lambro Industries 306 Aluminum Flexible Duct 6 Inches

Product Description

The LAMBRO INDUSTRIES 306 is a 6-inch diameter aluminum flexible duct designed for low-pressure air distribution in residential and light commercial HVAC systems. Supplied in an 8-foot compressed length, it expands to full working length during installation. The aluminum construction keeps the duct lightweight while providing adequate flexibility for routing around obstructions in tight mechanical spaces. HVAC technicians and installers use this duct to connect supply or return air outlets to rigid trunk lines, diffusers, or terminal equipment where a short flexible run is required.

This flexible duct is suited for residential forced-air heating and cooling applications, including connections between supply plenums and ceiling or floor diffusers. Its 6-inch diameter is a common size in residential trunk-and-branch duct systems. The bulk pack format, with 3 units per package, makes it practical for service vans or multi-unit jobs where multiple short flex runs are needed in a single visit.

Key Features

• 6-inch inner diameter fits standard residential supply and return branch fittings
• 8-foot compressed length extends to working length on installation
• Aluminum construction for lightweight handling and corrosion resistance
• Flexible design allows routing around framing, joists, and mechanical obstructions
• Bulk pack of 3 units per package reduces per-unit cost on multi-run jobs

Compatibility

Designed as an OEM-style replacement and new-installation flexible duct connector for residential forced-air HVAC systems using 6-inch branch duct connections.

Installation Notes

Installation should be performed by a qualified HVAC technician in accordance with SMACNA guidelines and local mechanical codes. Power down and lock out the air handler or furnace before making duct connections. Avoid compressing or sharply bending the flex duct beyond the minimum bend radius, as restriction reduces airflow and system efficiency. Secure both ends with approved clamps or draw bands and seal all connections with listed mastic or metal-backed tape per code.

Technical Specifications

• Diameter: 6 inches
• Compressed Length: 8 feet
• Material: Aluminum
• Weight: 3.15 pounds
• Package Quantity: 3 units per package

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 306