A quiet bedroom purifier: what information was missing when you shopped?

An editorial question to open the community. Headline CADR and quiet-mode noise often describe different operating settings. What information would have helped you compare machines for sleeping? Include your room size and country, and link to the exact local specification sheet when possible. This is an invitation for real discussion; it does not represent a fabricated customer experience.

Editorial example · This opening topic was written by the site team. It is not a user testimonial or a verified owner review.