According to the air quality monitor, the Honeywell PowerPlus removed all of the particulate matter from the air in the room within an hour of the incense burning out. All Honeywell air purifiers come with a permanent true HEPA filter, an Intelli-Check Monitoring System, and patented SurroundSeal technology. In addition, it ensures that the air… Continue reading Honeywell HEPA Air Purifier R Filter HEPA For Air Purifier Remove Allergens 100percent Particle Removal Efficiency 0 mil Particles 10 3 Height x 1.6 Width x 6.5 Depth