Your Guide to Ventilation Air Valves

Air valves are an important part to any mechanical ventilation system. They are used in rooms where the ducting meets ceilings or walls so that air can be properly extracted or supplied.

Air valves are adjustable and need to be set up during commissioning so that the correct air flow rate is reached. To adjust valves you simply rotate the central disc in or out to provide a larger or smaller air flow or insert a flow control damper.

Air Valve Placement

Valves are designed to be installed in round pipe or plenums through ceilings or walls. At least one supply or extract valve should be placed in every room in your home that you wish to extract air from or supply air to. They must be placed away from stoves, other extraction fans and cooker hoods.

How Many Valves & Points Are Required?

The amount of extract and supply points that you require is based on how many rooms are in your home. It can also depend on how big rooms are and how much humidity may be created in them. In larger and more humid rooms you may require extra points due to airflow demand. Each point is one valve.

We generally recommend that if a room has an area of 50m2 or larger, it would be required two air valves to provide a quiet system

Extract and Supply

Depending on the room it will decide whether you need an extract or supply.

Rooms that require extract points:

- Bathrooms

- Shower rooms

- Kitchens

- Utilities

- En suites

- Wet rooms

- And other rooms that require high humidity

Rooms that require supply points:

- Living areas

- Bedrooms

- Any habitable room

Rooms such as gyms and cinemas rooms etc may require both extract and supply points to ensure the best airflow.

To balance your system you may require points in entrance hallways and halls. It is also important to remember that systems must be commissioned, this will ensure that the airflow rates of your system are correct, and so that your system will run to the best of its ability.

Range of Valves

We will provide you with the correct valves and will be marked if they are supply or extract. Some valves are universal and can be used as both extract and supply depending on what is required.

Here at E-ZONG we offer an extensive range of air valves suitable for both domestic and commercial applications. Valves are available in a range of sizes to suit various ducting system installations. Contact us for more information if required.