Acoustic

Peace and quiet

Reducing the transfer of external noise to inside when dwellings are situated by close roads.

Noise and Ventilation

Noise is a nusiance and is the last thing that you want in the comfort of your own home. In new build particularly, it has become an increasing issue as a result of brownfield re-development and density planning guidance.

Noise sources can be both internal and external and ventilation specification can play a part in both.


What is acceptable noise?
The Building Regulations support the control of noise - from externall sources and from the ventilation system itself. For ventilation systems ADF:2010 suggests the following sound power levels for continously running systems:


Bedrooms/living rooms: An upper limit of 30dB(A) weighted sound power level Kitchens/bathrooms: An upper limit of 35dB(A) weighted sound power level

Acoustic Ventilation - What are the options?

When a site requires acoustic protection it is usually considered at planning and design stage and often means that certain building elements can no longer be used as a source of ventilation e.g. windows. In this instance, acoustic ventilation solutions are often required and a performance criteria based on a decibel reduction is required.

Acoustic Ventilation Solutions are available in many options including;

Window Ventilators - offering up to 42dB(A)
Wall Ventilators - offering up to 55dB(A)
Mechanical Input Fans - offering up to 44dB(A)

Due to the size of the products it may not always be the case that they can be simply swapped for the non-acoustic versions e.g. a standard window vent for an acoustic one. Therefore DESIGN is crucial. Sometimes the entire ventilation strategy may need to be re-considered to provide the most effective option e.g. MVHR Heat Recovery Ventilation

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