How should I store the air purifier if I won't be using it for more than 30 days?

Remove the HEPA Filters from the unit and wrap them in an airtight plastic bag. Also remove the Pre-Filter and Enhanced Odor and VOC Filters and store them in an airtight plastic bag. Additionally, the unit's exterior should be cleaned with only a dry cloth before storage — do not use water, wax, polish, or any chemical solution. (Page 8)

From the official Honeywell Hpa5100 Air Purifier manual, page 8

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