Rheia ST-L 3-Inch Flexible Uninsulated Ductwork, 50 ft

Flexible 3-Inch Air Distribution for Tight Installation Spaces

Route branch air supply and ventilation runs through compact framing spaces with Rheia ST-L 3-inch flexible uninsulated ductwork. Its durable reinforced core bends through wall cavities, joists, and drop ceilings where rigid ducting is difficult to install.

Supplied in a continuous 50-foot segment, it helps reduce extra couplers and joints across longer runs. This Class 1 air duct is UL 181 listed for safety and dependable HVAC performance.

Key Features

Flexible 3-Inch Diameter: Routes through narrow framing, wall bays, and tight structural spaces.

Durable Reinforced Core: Resists tearing, puncturing, and collapsing during normal installation.

50-Foot Continuous Length: Minimizes the need for additional couplers and joints across long runs.

UL 181 Class 1 Air Duct: Listed to applicable safety and fire-resistance requirements.

HVAC System Compatibility: Integrates with standard 3-inch ferrules, couplers, and distribution components.

Technical Specifications

Manufacturer / Line: Rheia ST-L

Part Number: 10-00-190

Duct Diameter: 3 inches

Length: 50 feet

Insulation Type: Uninsulated

Certification: UL 181 Listed, Class 1 Air Duct

Core Material: Heavy-duty reinforced core

Primary Application: Flexible branch air supply, ventilation, and air distribution

Package Quantity: One 50-foot segment