“How often does the filter need to be changed, and where are they sold?”
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It supposed to be once a year but once you sync it with your phone it will let you know when it needs to be changed. You can buy it either at Dyson or Best Buy.
Sorry, there was a problem. Please try again later.every few months. depends on how dirty your air is. mine lasted almost a year. i order filters from Dyson.com
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