Got yesterday the fan. The delivery was quick. The fan I abe run overnight in the bedroom. Even as he was as good as not to hear. The air flow is sufficient for the office to cool an entire room down, of course, but the wrong product category. While working at the desk he produced already at level 1 and a pleasant wind is barely audible. From me, therefore, a strong buy recommendation to people who are looking for a fan for the office and do not want to make one of these ugly white monster on the desk.