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What's the difference between acoustic louvres and standard louvres?

Understanding the differences between acoustic louvres and standard louvres is key to specifying the correct system for your project.

 

Topics covered:

  • The design of standard louvres and where they're used.
  • The design of acoustic louvres and where they're used.
  • Acoustic louvre testing standards.
  • How to choose between specifying acoustic and standard louvres.

Many people ask about the key differences between acoustic and standard louvres. In summary, standard louvres allow ventilation but provide no sound attenuation, whereas acoustic louvres are designed to block noise and allow air to pass through.

In this article, we compare the two types in a bit more depth, offering insight for architects, contractors, and specifiers.

What are standard louvres?

Standard louvres are simple yet effective systems designed to facilitate airflow while preventing the entry of rainwater, debris, and insects. They are lightweight, easy to install, and often require very little maintenance. They are frequently used in car parks, stairwells, industrial buildings, and areas where ventilation is needed but noise control is not a concern.

What are the main types of louvre systems?

What are acoustic louvres?

Acoustic louvres, on the other hand, are designed specifically to reduce airborne noise while still allowing airflow. Internally, these louvres feature sound-absorbing materials such as mineral wool. Their design is more complex and typically includes a deeper profile and heavier components. These louvres are independently tested and rated to standards like ISO 7235 and are essential in locations where sound attenuation is necessary. In industrial and commercial facilities like data centres, warehouses, and energy substations, acoustic louvres play a critical role in reducing noise from fans, generators, and HVAC machinery. These systems not only help meet compliance standards, such as BS 4142:2014, but also reduce the risk of complaints from neighbouring properties.

How are acoustic louvres tested?

A comparison of key features

To compare these systems, consider their performance side by side. Standard louvres offer effective ventilation and weather protection with maximum airflow but provide no sound attenuation. Acoustic louvres, in contrast, use internal baffles to significantly reduce noise. This comes at the cost of reduced free area and greater depth, though they remain weather-resistant and versatile.

Standard louvres are more lightweight and cost-effective, making them suitable for simple applications. Acoustic louvres are heavier and more expensive due to added acoustic materials, but they deliver compliance with noise regulations, greater occupant comfort, and lasting durability.

Choosing between them is about more than cost, it's about meeting performance needs. In noise-sensitive environments or where planning regulations apply, acoustic louvres are often essential, balancing airflow, weather protection, and reliable noise control.