The invention relates to a the air purification device (1) with o3 - neutralizer (8) and an air cleaning method. The air-cleaning device (1) has a blower (6), a o3 - generator (7) and the o3 - neutralizer (8) on. The o3 - generator (7) and the o3 - neutralizer (8) are in an air duct (9) with an air inlet opening (10) and an air outlet opening (11) to be cleaned air flow (12) of the blower (6) exposed to.
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