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The LAMBRO INDUSTRIES 304 is an aluminum flexible duct section designed for low-pressure exhaust and ventilation applications in residential and light commercial HVAC installations. Measuring 5 inches in diameter and shipping at 8 feet compressed length, this duct provides the flexibility needed to make transitions between rigid duct runs and equipment connections. Constructed from aluminum, it resists moisture and corrosion in typical exhaust environments. Each order includes five sections, making it a practical bulk option for contractors stocking up for multiple jobs or service calls.
This flexible duct is suited for dryer exhaust, bathroom fan exhaust, range hood transitions, and similar low-velocity ventilation runs where a rigid connection is impractical. It installs in residential single-family and multi-unit construction as well as light commercial retrofit scenarios. HVAC and sheet metal technicians commonly use this product when connecting equipment collars to rigid trunk lines or exhausting through wall or ceiling cavities where a straight rigid run is not feasible.
Designed as an OEM-style flexible duct section for use with standard 5-inch diameter residential and light commercial exhaust and ventilation systems.
Installation is typically performed by licensed HVAC technicians or sheet metal contractors in accordance with local mechanical codes and SMACNA guidelines. Disconnect power to any associated fan or appliance before beginning duct work. Secure both ends of the flexible duct with approved clamps or foil tape rated for the application, and avoid sharp bends that restrict airflow or cause premature wear. Keep the run as short and straight as possible to maintain system efficiency.
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