"Replaced a noisy Manrose centrifugal fan in a small, busy shower/utlity room with this upmarket unit. Slightly fiddly to install this bigger unit in a tight corner on the old trunking. But superb performance and whisper quiet on its lowest speed. Very efficient extraction and worth considering for even small rooms. 2 min delay before starting and variable over-run. Good build quality and designed for easy impeller cleaning. Just hope it give years of service."