In this video, we go through the three different fan speeds on the Smart Air SA600 so you can hear how noisy this air purifier can get.

At its lowest speed, the SA600 only hits 24dB, which is pretty much whisper-silent to most ears.

At its highest speed, we found that the SA600 hit 52dB, which is equivalent to a refrigerator humming in the background.

If you're considering buying a Smart Air SA600, you should read our full review to help you decide at https://housefresh.com/smart-air-sa60...