In highly sensitive environments such as metrology labs, semiconductor lithography bays, and life science research facilities, excessive noise and vibration from cleanroom ceilings are unacceptable. In this FAQ, DSX Purification answers the critical question: What noise levels can a truly Low-Noise FFU achieve? We break down the standard decibel dB(A) ranges, explain how our in-house engineered EC motors and aerodynamic impellers suppress harmonics, and detail the technical mechanisms behind our ultra-quiet, vibration-controlled Fan Filter Units.