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Free Area of Acoustic Louvres Explained If you need to comply with legislation for airflow through your Acoustic Louvre application, or you need to ensure your plant isn't starved of air, then you need to know that the % Free Area has been calculated accurately. Otherwise you might specify an Acoustic Louvre that fails to comply because it claims to have a higher, and yet inaccurate % Free Area than larger, correctly sized and more expensive Acoustic Louvres. BSRIA has confirmed that our method of calculating the % Free Area for Caice Acoustic Louvres is in accordance with BS EN 13141-1:2019*. See our Acoustic Louvre brochure, where we provide our data in accordance to BS EN 13141-1:2019. https://bit.ly/3UGoBwj *BSI Standard; BS EN 13141-1:2019 section 5.4 Free area states that the “Free area shall be calculated from the measurements in one plane of the air transfer device. The measurement plane shall be such that the total cross section area of the air flow passage(s) crossing the minimum.” #FreeArea #CaiceAcoustics #AcousticLouvres

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