“How often do I need to change the filter on my Dyson - TP04 Pure Cool Tower 400 Sq. Ft. Air Purifier - White/Silver?”
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Hello Charles, this is Kelly with Dyson. The filters for all of our air purifiers will have 4382 hours of life. If you run your machine 12 hours a day, the filter will last you about a year. Best wishes, Kelly Dyson Customer Support
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