What Type of Metal Ductwork Is Best?

Metal ductwork can come in flat channel, and round ducting. Below is a brief explanation.

Round ducting:

Round ducting has the highest airflow performance, this is due to a wider diameter increasing its free area. The lack of corners also decreases resistance within the pipe, which allows for higher airflow rates and higher rates of ventilation.

It is recommended for most applications where space is available for installation. Its main purposes are for long ducting runs, whole-house ventilation systems, HVAC systems, bathroom, toilet and utility room extract fan venting, or any occasion where high rates of extraction are required.

Round PVC ducting pipe can be used for venting exhaust odours and steam from cooker hoods, although flexible ducting may be easier to install in many instances. 

Flat channel duct

Square ducting (also known as flat channel ducting) is ideal when a low profile is required due to a lack of space. It can also be concealed and flush fit against ceilings and walls or within voids.

Please bear in mind that as a result of a lower free area, there is greater pressure created within a duct run. It is therefore essential that you check the manufacturer information for the fan you are planning to install within the run. 

Be mindful of where you place your ducting to understand what kind of ducting you need, and where its access doors will be, which are vital to maintaining the effectiveness of your ventilation by cleaning the ducting buildup at regular intervals.

Which is ductwork better?

It’s difficult to give a definitive answer to this question as the effectiveness of these ducting styles will be subjective to your needs, along with the location the ducting will be placed alongside the space required, and the space itself. (e.g Is it a home or an industrial space?)

To help you choose as to which you feel will be better for your situation, we have provided a table for each duct highlighting their pros & cons.

Pros & Cons of Round Ducting

Pros & Cons of Square (Flat Channel) Ducting

Which ductwork resists mould?

Every piece of ductwork is created in such a way as to mitigate the collection of mould, however, due to the resilience of mould and its natural ability to grow on almost any surface, you will be hard-pressed to stop ducting from growing mould if it is next to a mouldy site, or in an environment that cultivates it.

Plastic ductwork

Our lightweight PVC-coated ductwork is manufactured from high-quality uPVC and is designed to create minimal air resistance, maximum airflow and minimal pressure loss. We provide plastic ducting lengths, connectors, bends, brackets, and accessories such as reducers, attenuators and other fittings.

Plastic ducting is ideal for accommodation/home settings, however, there may be situations where plastic ductwork is a better option than metal.

If you have questions about our ducting or if it would be appropriate for your project, please don’t hesitate to get in touch with us so we can direct you in the best possible way for all of your ducting needs.

Purchase your metal ducting today