In a 350-square-foot room, it can deliver 5.3 air changes per hour (ACH) based on its CADR measurements, nearly identical to the results that we got from the Coway AP-1512HH and slightly more than what the Winix models can achieve. Levoit claims their purifier can trap 99.97% of fine particles that are 0.3 microns in… Continue reading Levoit Filter: Core 600S Replacement Filter VeSync Store