How long does the Safe+Mate Air Purifier true HEPA filter last? February 09, 2022 14:42 Updated For best results, we suggest replacing the filter every 6 months. Related articles How do I remove the Safe+Mate Air Purifier filter? Is there a filter included with the Safe+Mate Air Purifier? How do I file a warranty claim on the Case-mate.com website? The case I want is out of stock. When will it be available again? Do I need a MagSafe case to use MagSafe Accessories? Comments 0 comments Article is closed for comments.