The Silver Nano Technology releases silver ions that inhibits air-borne bacteria from multiplying. Used with the DD1 desiccant dehumidifier air-borne bacteria will be controlled. We recommend that the Silver Nano filter should be replaced annually and cleaned every 2 weeks. Simply brush off the excess dust or a gentle vacuum will suffice, do not wash or rinse as this will remove the Silver Nano on the filter. Compatible Models DD1 Classic Blue | DD1 Classic Black | DD1 Classic Pink | DD1 Simple Blue | DD1 Simple Black | DD1 Simple Pink Specification Silver Nano Filter Inhibits Bacteria when used with the dehumidifier YES Applicable Models DD1 Simple and DD1 Classic Dimension mm 238 x 256 x 2 Color White Note: Due to our policy of innovation some specifications may be changed without notification.