@mgubrud @jeremychrysler I mostly run them on low (though switch to high temporarily if I know air is particularly dirty). Still quite high CADR and CADR/$ as per your graph and much less noise even compared to medium. Perceived noise is subjective and depends on ambient environment though.
@mgubrud @jeremychrysler 我主要在低速运行它们（但如果我知道空气特别脏，暂时切换到高速）。根据您的图表，CADR 和 CADR/$ 仍然相当高，即使与中等相比，噪音也要小得多。感知到的噪音是主观的，并且取决于周围环境。