Black Combi Ducting 10 Metre Box

Black Combi Ducting – 10 Metre Box

Our Black Combi Ducting is a durable, flexible ventilation ducting designed for use with extraction fans, carbon filters and other ventilation equipment. Combining an aluminium foil inner duct with a strong black PVC outer coating, it offers improved resistance to damage and quieter operation compared with standard aluminium foil ducting.

The protective PVC covering helps strengthen the ducting, making it suitable for ventilation installations where additional durability is required. Its flexible construction allows it to be routed around equipment and through confined spaces while maintaining an effective airflow path when correctly installed.

Available in diameters from 4" to 14" (100mm to 355mm), our Black Combi Ducting is supplied in convenient 10 metre boxes and can be cut to the required length.

How to Fit Black Combi Ducting

Combi Ducting is straightforward to install and connects directly to the male spigots found on most extraction fans, carbon filters and ventilation fittings.

1. Measure and cut: Measure the length of ducting required, allowing enough material for secure connections. Carefully cut the ducting to length using suitable tools, taking care around the internal wire reinforcement and sharp edges.
2. Connect the ducting: Slide one end of the ducting over the male spigot of your extraction fan, carbon filter or duct fitting. Ensure it fits securely over the connection.
3. Secure the connection: Use a Jubilee clip, fast clamp or suitable duct tape to fasten the ducting firmly around the spigot. Check that the connection is secure to help prevent air leaks.
4. Position the ducting: Gently extend the ducting along its intended route, keeping it as straight as practical to reduce airflow resistance.
5. Connect the opposite end: Fit and secure the other end to your ventilation equipment or outlet, ensuring the ducting is properly supported and free from kinks or restrictions.

Joining Two Lengths of Combi Ducting

If you need to join two pieces of Combi Ducting together, use a correctly sized male duct connector.

Slide each length of ducting over the opposite ends of the connector and secure both connections using Jubilee clips, fast clamps or suitable duct tape. Make sure the joint is secure and properly sealed to help maintain efficient airflow.

Installation Advice

For the best performance, keep ducting runs as short and straight as practical. Fully extending the ducting helps reduce internal ridges that can create turbulence, increase noise and restrict airflow.

Avoid sharp bends, crushed sections and unnecessary changes in direction. Where a bend is required, we recommend using a Pressed or Sectional Duct Bend. These provide a consistent bend radius to help minimise turbulence and maintain airflow.

Ensure the ducting is adequately supported, particularly on longer runs, to prevent sagging or excessive strain on the connections.

Black Combi Ducting Specifications

Key Features & Benefits

• Durable black PVC coating: Provides additional protection against damage compared with standard aluminium foil ducting.
• Quieter operation: The outer PVC layer helps reduce noise associated with standard foil ducting.
• Flexible construction: Easy to route through ventilation installations and around equipment.
• Suitable for extraction systems: Compatible with correctly sized extraction fans, carbon filters and duct fittings.
• Wide range of diameters: Available in sizes from 4" to 14" (100mm to 355mm).
• 10 metre box: Supplied in a convenient length that can be cut to suit your installation.

Choosing the Right Combi Ducting

When selecting Combi Ducting, choose a diameter that matches the spigot size of your extraction fan, carbon filter or ventilation fitting. Using the correct size helps maintain airflow and avoids unnecessary restrictions within your ventilation system.

Combi Ducting vs Acoustic Ducting: Black Combi Ducting is a good choice when you want a tougher alternative to standard aluminium foil ducting with some reduction in operating noise. If reducing fan and airflow noise is your main priority, consider Acoustic Ducting, which features an additional sound-absorbing insulation layer.