MeacoClean CA-HEPA 76x5 Replacement HEPA H13 FilterThe combination filter for MeacoClean CA HEPA 76x5 consists of the pre filter, the HEPA and the carbon filter. The filter must be replaced when the ioniser filter button flashes red it will do this after 2200 hours of use or if it detects dust and dirt on the filters. To maintain the best performance of the air purifier, replace the filter at the right time.