Ultra Quiet In-Line Duct Fans Presenting the world’s most silent in-line fan range in their class, the Silent MV range creates a quantum leap forward in technology to improve the acoustic performance of up to 12 dB(A) compared with similar products on the market. The Silent MV range is the result of an intense R&D, technological and economic investment to ensure that you can be guaranteed of a product range that provides exceptional performance with significant noise reduction. Following extensive aerodynamic testing, we have been able to not only reduce the amount of noise produced but also ensure that the noise level that is actually emitted is at a far lower frequency, providing a quiet and ambient environment. By installing the Silent MV, you will never experience the disturbance of noisy ventilation again. How does it work? Sound waves produced inside the SILENT MV are directed through the perforated inner cover and absorbed by the layer of sou