BISSELL air400 home air purifier provides Simply Clean Air™ from a trusted brand in homecare. We know life happens. With kids and pets in the home, there are also allergens, odors, dust, and other irritants we can't always see in our air that need to be cleaned. That's why air400 air purifier is designed to perform from the inside, out. It captures airborne particles and odors with three stages of filtration. One of three filter stages features a medical-grade HEPA filter, meaning BISSELL air400 is an air purifier that captures 99.97% of particles 0.3 microns and smaller when on lowest fan speed, helping to remove airborne irritants like pet dander, pollen, dust, and smoke like that from wildfires, cooking and smoking.