The DD3 Classic & DD3 Simple filter features with Anti- Bacterial Filter. The Silver Filter Technology releases silver ions that inhibits air-borne bacteria from multiplying. Used with the DD3 desiccant dehumidifier air-borne bacteria will be controlled. We recommend that the DD3 Classic & DD3 Simple filter should be replaced every 6 months, depending on usage and the environment and cleaned every 2 weeks. Simply brush off the excess dust with a soft brush or a gentle vacuum will suffice, do not wash or rinse as this will remove the Silver on the filter. Compatible Models DD3 Classic | DD3 Simple Specification Silver Filter Inhibits Bacteria when used with the dehumidifier YES Applicable Models DD3 Simple and DD3 Classic Dimension mm 270 x 295 Color White Note: Due to our policy of innovation some specifications may be changed without notification.