As Noted in our guidebook to top rated-rated quiet air purifiers, we suggest cross-checking claimed decibel degrees with purchaser groups like Silent Mark, a United kingdom-primarily based impartial international certification system that identifies the quietest solutions. ฝุ่นละออง, เชื้อรา, ละอองเกสร และแบคทีเรีย Because this item isn't stocked in our warehouse, processing, transit https://www.mannature.com/products/detail/airpurifier