As Observed in our information to prime-rated tranquil air purifiers, we endorse cross-examining claimed decibel stages with purchaser groups like Silent Mark, a United kingdom-based unbiased world-wide certification system that identifies the quietest products. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท In keeping with AHAM , your air purifier must have a CADR score similar to https://www.mannature.com/products/detail/airpurifier