Flexible ventilation duct airRoxy FLEX 120 — round flexible duct for air extraction and supply, 120 mm diameter

Flexible ventilation duct airRoxy FLEX 120 is a round flexible duct with a 120 mm internal diameter designed for air extraction and supply in ventilation systems. Constructed to connect fans, vents and appliances, this flexible duct enables straightforward routing around obstacles and tight spaces while maintaining airflow between rigid ductwork and equipment. The product is intended for residential and light commercial installations where a flexible connection is required.

Advantages

The duct combines flexibility with dimensional stability, simplifying installation in confined or irregular spaces. Its circular cross-section supports efficient airflow and reduces turbulence compared with non-round shapes. The material and construction provide resistance to kinks during installation and allow a secure fit to standard round fittings. The product is lightweight, easy to handle and can be cut to length on site to match required runs.

Suitable for

• Connecting extract fans to rigid ductwork in bathrooms and kitchens
• Supply or exhaust connections for small ventilation units and range hoods
• Short to medium-length duct runs where flexibility is needed to navigate obstacles
• Residential ventilation systems and light commercial applications

Key specifications

• Shape: round
• Internal diameter: 120 mm
• Function: air extraction and supply
• Compatibility: connects to standard 120 mm round fittings and fans
• Material attributes: flexible construction designed to resist kinking during installation
• Installation: cut-to-length on site for custom runs

How to use

Measure the required run and cut the flexible duct to the needed length with appropriate tools, ensuring a clean straight cut. Slide the duct over the round collar of the fan, vent or duct connector and secure with an appropriate clamp or tape rated for ventilation use. Avoid sharp bends with radii smaller than recommended for 120 mm ducts to preserve airflow. Ensure connections are sealed to prevent leakage and supported along the run to prevent sagging.

Usage recommendations

For optimal performance, use the flexible duct for short to medium runs and minimize the number of sharp bends. Secure both ends with clamps and check for air leaks after installation. Where permanent straight runs are required, consider combining this flexible duct with rigid ducting to reduce pressure loss.