Featuring HEPA filtration this air purifier has been engineered to help capture up to 99.97% of the following microscopic airborne allergens and particles: dust pollen pet dander dust mite debris and smoke¹. The patented 360 degree air intake maximizes efficiency. This unit is ideal for wildfire smoke can impact the air quality where you live even if you don’t live anywhere near the fires themselves. Because smoke contains extremely small particles air purifiers can help remove some of these particles¹ from your air. For best performance use only Genuine Honeywell air purifier filters.