Embee's pre filters and H14 HEPA filter are framed in recyclable aluminium. Please see here for information on aluminium recycling in Hong Kong. For other jurisdictions, please refer to the relevant local facilities. The filters contain no harmful substances, and in the absence of suitable recycling facilities, may be safely disposed of in the regular trash after use. *Please note that these guidelines assume that the filter has been used in a typical household setting. If the filter has been used to filter regulated substances in an industrial setting, then the appropriate local disposal regulations pertaining to those substances should be followed.