In Regards to sheer air purifying electrical power, the Alen is best with our testers. You'll pay back a high quality for that overall performance, and it is a beast of a device, although the Alen would be the unusual device that will capture contaminants right down to 0. กำจัดฟอร์มาลดีไฮด์และมลพิษ waiting for link from Social Network Posts (25)