Builders Best 10319 Semi-rigid Flexible Aluminum Duct 7in 8ft

Product Description

The BUILDERS BEST 10319 is a semi-rigid flexible aluminum duct section designed for residential and light commercial ventilation applications. Measuring 7 inches in diameter and 8 feet in length, it provides a durable, low-restriction airflow path between exhaust fans, range hoods, dryers, and exterior termination fittings. One end is factory-crimped for easy insertion into fittings or duct collars, and the opposite end is plain for field connection. HVAC technicians and ventilation installers use this duct section where a rigid duct run requires a degree of flexibility to navigate offsets or vibration transitions.

This duct section is suited for exhaust ventilation systems in residential kitchens, bathrooms, and utility areas, as well as light commercial ventilation runs. The semi-rigid aluminum construction holds its shape after bending, reducing the internal turbulence and pressure drop associated with fully flexible vinyl or foil ducts. It is commonly installed between wall or ceiling cavities and termination caps, grille boxes, or inline fan housings where a 7-inch diameter connection is specified.

Key Features

• Semi-rigid aluminum construction holds shape after bending without collapsing
• 7-inch diameter fits standard 7-inch duct collars, exhaust fan housings, and termination fittings
• 8-foot length provides sufficient run for most residential offset and transition applications
• One factory-crimped end simplifies insertion into collars and downstream fittings
• One plain end allows field cutting or direct connection to upstream components
• Aluminum material resists moisture and is suitable for exhaust airstreams

Compatibility

Designed as an OEM-style replacement and new-installation duct section for 7-inch diameter residential and light commercial exhaust ventilation systems.

Installation Notes

Installation is typically performed by HVAC technicians or sheet metal mechanics following local mechanical codes and ASHRAE ventilation guidelines. Secure both ends with approved duct clamps or foil tape rated for the application before restoring system power or airflow. Avoid compressing or over-bending the duct, as sharp bends increase static pressure drop and reduce system performance. Ensure the duct run is supported at appropriate intervals to prevent sagging.

Technical Specifications

• Diameter: 7 inches
• Length: 8 feet
• Material: Aluminum
• Construction Type: Semi-Rigid Flexible
• End Configuration: 1 crimped end, 1 plain end

Standard Information

• Brand: BUILDERS BEST
• Manufacturer Part Number: 10319