While the manufacturer advertises this air purifier as having a four-stage filtration system, its actual filter has only three physical layers: 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. This system releases negative ions into the air that impart an electrical charge to small particles, causing them to clump together and fall to the ground or any other flat surface, where you can easily clean them up. The downside of an ionizer like this is that it also produces ozone as a byproduct, which can irritate your respiratory system 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.