Guardian Technologies Universal Wall Sleeve for Humidifier

The PureGuardian Demineralization Cartridge can be inserted into the following models: H1200, H1200BL, H1210, H1250, H1300, H3200, H3250, H7500, H7550, H7560B, H1175 and H5225, H5175W to help prevent the release of minerals into the air that can cause white dust. The demineralization filter is easy to use. Simply screw the filter into the humidifier tank to help reduce the release of minerals (white dust) into the air.