Philips air purifier pre-filter care in 6 steps: what can be washed?
Distinguish washable standalone pre-filters from replace-only HEPA/carbon filters and check your exact model before cleaning.
Official Philips guide to pre-filters versus replace-only filters. Text-only link card; no reused image.
Text link to Philips official air-purifier filter care instructions
Open source ↗Philips explains that some separate pre-filters are washable, while HEPA and carbon media are replace-only. For certain cylindrical composite filters, the outside pre-filter is vacuum-cleaned instead. Always identify your exact model first.