I don't know how to judge the quality of the air because I didn't see any difference. All I can do is hope that it does what it's supposed to do because I selected it based on other people's opinions. Some pros: The appearance, the presence of air ionization and a UV lamp, the ability to switch off the backlight so that it does not shine at night, the straightforward operation, and the illumination. Having these drawbacks: My guess is that the lamp caught fire pretty rapidly, and you should probably replace the filter because it is really noisy.
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