Like with the Coway Airmega AP-1512HH Mighty, this air purifier’s four-stage filtration system only has three physical filters: a pre-filter for trapping larger particles, a True HEPA filter, and a Carbon filter for minimizing odors. The fourth ‘stage’ is the device’s built-in ionizer, which imparts a negative charge to fine airborne particles, causing them to be attracted to one another. From there, they form heavier clumps that fall out of the air, where you can clean them up. The downside of ionizers is that their operation produces ozone as a byproduct, which can irritate your lungs through prolonged exposure. If you don’t want to use the ionizer, you can turn it off.

You’ll need to clean the pre-filter under water or vacuum off any stuck-on debris and dust every two to four weeks.

You’ll need to replace the True HEPA/Activated Carbon filter every 12 months and the carbon filter every six months. These two filters are sold in a single pack and can be purchased here.