As Noted within our guidebook to major-rated peaceful air purifiers, we endorse cross-checking claimed decibel concentrations with shopper groups like Silent Mark, a British isles-primarily based independent world certification program that identifies the quietest items. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท The dearth of oversight is a concern — you might be depending on makers Successfully Submitted (Awaiting Approval)