Product information “Replacement filter set for AC-4000 (Air Purifier)” SCOPE OF DELIVERY: 1x aluminium pre-filter 1x combination filter HEPA H13 Information for filter exchange: Filters have to be exchanged at certain intervals, depending on the use. Depending on how clean the ambient air is, the pre-filter should be cleaned with a vacuum cleaner every 2-3 weeks. It should be cleaned with clear water (and detergent as anti-grease agent, if necessary) every 2 months. Let the filter dry completely before inserting it again. The intelligence control unit will issue a reminder for replacing the combi filter after 3,000 operating hours. Under normal ambient air conditions, the combi filter can be used for a maximum of 12 months.
