Are there any low-noise blowers?
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We are looking for a low-noise blower. The Roots blower we currently use generates a noise level of over 90 decibels, which affects the health of our employees; therefore, we intend to replace it with a low-noise blower with an outlet pressure of 20–30 KPa (gauge pressure) and a capacity of 90 Nm3/min.
Many years ago, I visited a sewage treatment plant in Chengdu and noticed that the noise level of their aeration fans was less than 75 decibels; these fans were installed right next to the employees’ dormitories. I just checked the photo; the model is Emore Horn, EHS-439. Search for it online by yourself; I remember the people from the sewage treatment company saying that it was produced by a Taiwanese company.
Thank you to the person above; I have contacted the manufacturer and am waiting for details on when it will be fixed