A heating assembly for a vapour generating device. The heating assembly comprises: a heating chamber arranged to hold an aerosol generating medium; a heater arranged, in use, to provide heating to the heating chamber; and an ejector arranged to controllably eject, in use, the aerosol generating medium from the heating chamber.本發明揭示一種用於一蒸氣產生裝置之加熱總成。該加熱總成包括:一加熱腔室,其經配置以固持一氣膠產生介質;一加熱器,其經配置以在使用中為該加熱腔室提供加熱;及一頂出器,其經配置以在使用中可控制地自該加熱腔室頂出該氣膠產生介質。