4 Inch Insulated Flexible Duct 25 FT, R4 HVAC Flex Duct Black Jacket, Owens Corning Fiberglass, Ventilation

This R4 insulated flex duct is designed for HVAC and ventilation applications where temperature loss and condensation are concerns.

• R4 insulated flex duct (4"×25') – reduces temperature loss and improves airflow efficiency in unconditioned spaces.
• 3‑layer: black PE outer jacket, Owens Corning fiberglass insulation, reinforced aluminum foil inner core – durable and stable.
• Insulation limits condensation in attics, crawl spaces, basements, garages – ideal for areas with temperature differences.
• Lightweight, highly flexible for tight spaces; cut to length with standard tools; connect to duct fittings, clamps, or tape.
• For bathroom exhaust fans, HVAC supply/return runs, general ventilation in residential and light commercial projects.