How much airflow can I expect through a single Silenceair^® wall vent?

The aerodynamic ventilation passage allows for higher airflows at lower pressure than traditional foam-lined ducts. At very low wind pressures, the Silenceair^® 240,140 and 140 Premium wall vents can allow nearly twice as much air through the same size aperture as foam-lined products.

For example, assuming a gentle summer breeze, each Silenceair^® unit allows nearly 25 cubic metres of air into a room each hour. Fitting two units into a standard room size of 12 square metres will allow total air recycling every 35 minutes.

What if I open my window? 

Silenceair^® is designed to reduce the noise that comes in through the ventilator passage that is built into the unit itself. It does not absorb noise that is already in the room. It cannot stop noise out in a garden or street or absorb the noise that comes through an open window. It is designed to provide you with a ventilator air passage that is acoustically controlled, thus reducing the need to open the window and maintaining the integrity of the acoustic barrier of the wall. The idea is to let light in through your window and see out your window and let your fresh air in through the wall so you can reduce the noise. 

How many Silenceair^® wall vents do we need?

On average, you will need two for a living space and one for each bedroom. It is important to consider if you can get cross ventilation through the rooms, as this will help with air movement. If you are in an office it depends on the size of the office. 

How can Silenceair^® wall vents be used as part of a whole-home or whole-office ventilation system? 

Installing Silenceair^® wall vents into your home or office can provide a low-energy alternative to air conditioning or noisy mechanical ventilation systems.

To work effectively as a whole-home or whole-office ventilation system, in cases where you cannot obtain adequate cross ventilation, Silenceair^® wall vents should be used in conjunction with passive thermal chimneys, wind turbine ventilators (whirligigs) or bathroom / kitchen exhaust fans. This will ensure that there is enough pressure difference between the inside and outside of your home or office to draw fresh air in through the Silenceair^® vents.

To ensure that all rooms can benefit from the ventilation, there must be an adequate ‘air corridor’ between rooms. This can be achieved simply by undercutting the interior doors by 20 mm.

Can I filter the air?

Filter pads can be added to the system, but remember that the filters will cause some resistance to normal air flow. 

Can Silenceair^® wall vents be used to keep noise inside a room, such as a home theatre, music room or recording studio?

Silenceair^® wall vents are also highly effective at keeping noise in. They can be installed in any area where you wish to contain noise, while still providing adequate ventilation, such as music practice rooms, home theatres, workshops, office/warehouses and recording studios. In these situations, the Silenceair^® wall vents should be installed in reverse. 

How do I maintain my Silenceair^® wall vents?

Silenceair^® vents contain no moving parts, so they are extremely simple to maintain. An occasional rinse in soapy water will maintain performance indefinitely.