Round plastic ducting has the greatest airflow performance but can be more difficult to conceal, whereas flat channel duct can be concealed within voids and flush fit, but has a lower airflow rate. The acceptable temperature ranges are from a minimum of -15 to a maximum of 60 degrees Celsius. It is ...
Round plastic ducting has the greatest airflow performance but can be more difficult to conceal, whereas flat channel duct can be concealed within voids and flush fit, but has a lower airflow rate. The acceptable temperature ranges are from a minimum of -15 to a maximum of 60 degrees Celsius. It is usually made from a PVC Polystyrene, and is less prone to corrosion than metal ducting, as condensation trapped within a duct run can corrode metal ducts over time. Condensation traps placed within a duct run will reduce the overall moisture level.
Installing Pipes and channel lengths can be achieved with push-fit connections, as they are “female” and will accept male connecting parts such as bends or reducers. If your pipe or flat channel needs to be cut, use a hacksaw and then rub down the cut point with coarse sandpaper. Duct tape or sealant can then be used for an airtight finish.
Plastic ducting is usually white, but if required, it can be painted using an emulsion paint colour of your choice. You may need several coats to achieve a less “patchy” finish. It is recommended that you rub-down the ducting you wish to paint with coarse sandpaper to allow the emulsion paint to adhere more thoroughly.
Should you require a combination of both round and flat ducting lengths due to space restrictions or any other reason, this can be achieved by way of an adaptor. This lets you adapt a round ducting run to flat.
In certain circumstances, you may need to reduce the size of the ducting run you are creating. This is achieved with a reducer. Multiple sizes of plastic ducting reducer are available and use simple push-fit connections. If venting an extract fan, it is recommended that you check the power of the unit. Changing the sizes of the ducting can increase or decrease the pressure within the run, therefore either increasing strain on the unit or decreasing its efficiency.
Round ducting has the highest airflow performance and is recommended for most applications where possible. Its main purposes are for long ducting runs, whole-house ventilation systems, bathroom, toilet and utility room extract fan venting. Sizes are available from 100mm, 300mm, 500mm and 600mm diameters, with sizes between these dimensions also available. Both round and flat ducting have smooth inner surfaces to reduce air resistance and noise.
- High airflow - Difficult to conceal - Less friction - Inappropriate for low-pressure systems - Better for high-pressure systems - Designed for HVAC systems
Flat Channel Duct:
Flat channel ducting is ideal when a low profile is required due to lack of space. It can also be concealed and flush fit against ceilings and walls or within voids. Generally used for installations requiring low extraction rates such as bathrooms, toilets, and utility rooms. Sizes available from 110x54mm to 310x29mm.
- Easy to flush fit and conceal - Creates more noise within duct run - Great for low-pressure systems - Inappropriate for high-pressure systems
Bends, connectors, attenuators, grilles, fire-rated products etc are all available to help you complete your duct run. Please browse the categories on the left to find what you require.
All our plastic ducting has been produced to provide the lowest air resistance, highest air flow and least pressure drop/leakage.
Key Takeaways (TLDR)
Plastic ducting comes in round and flat types. Round ducting is better suited for high-pressure installations but is harder to conceal. Flat channel ducting can be flush fit and hidden in voids but is inappropriate for high-pressure systems.