The Winix ZERO Air Purifier AUS-1050AZBU features a four stage air purification process that effectively captures airborne pollutants, allergens, smoke and household odours. The four stage filtration includes pre-filter, deodorisation filter, HEPA Filter and Winix PlasmaWave Technology. The Winix AUS-1050AZBU is the most advanced air purifier, providing relief to asthma sufferers and those affected by respiratory issues, as well as protecting families from the harmful effects of polluted indoor air.