An electrically heated aerosol-generating device for use with a consumable cartridge comprising a storage portion containing an aerosol-forming substrate, the storage portion having a fluid permeable internal surface surrounding an open-ended passage extending through the cartridge, the device comprising: a housing having a cavity for receiving at least a portion of the cartridge; and a heater assembly positioned in the cavity, the heater assembly comprising: an electrically conductive hollow shaft portion connected to the housing and defining an airflow passage forming part of an airflow pathway through the device, the hollow shaft portion being arranged to extend into the open-ended passage of a cartridge received in the cavity, and a plurality of electric heaters spaced apart along the length of the hollow shaft portion, each electric heater comprising at least one heating element for heating the aerosol forming substrate of a cartridge received in the cavity, wherein the hollow shaft portion comprises a plurality of apertures, and wherein each heating element is formed by one or more narrow regions of the hollow shaft portion between adjacent apertures, wherein the plurality of electric heaters are electrically isolated from each other so that each can be heated independently, wherein the hollow shaft portion is at least partially divided into a plurality of electrically isolated sections for coupling the plurality of electric heaters to an electrical power supply, and wherein the electrically isolated sections are electrically isolated from each other by one or more insulating gaps formed in the hollow shaft portion. a housing having a cavity for receiving at least a portion of the cartridge; and a heater assembly positioned in the cavity, the heater assembly comprising: an electrically conductive hollow shaft portion connected to the housing and defining an airflow passage forming part of an airflow pathway through the device, the hollow shaft portion being arranged to extend into the open-ended passage of a cartridge received in the cavity, and a plurality of electric heaters spaced apart along the length of the hollow shaft portion, each electric heater comprising at least one heating element for heating the aerosol forming substrate of a cartridge received in the cavity, wherein the hollow shaft portion comprises a plurality of apertures, and wherein each heating element is formed by one or more narrow regions of the hollow shaft portion between adjacent apertures, wherein the plurality of electric heaters are electrically isolated from each other so that each can be heated independently, wherein the hollow shaft portion is at least partially divided into a plurality of electrically isolated sections for coupling the plurality of electric heaters to an electrical power supply, and wherein the electrically isolated sections are electrically isolated from each other by one or more insulating gaps formed in the hollow shaft portion. an electrically conductive hollow shaft portion connected to the housing and defining an airflow passage forming part of an airflow pathway through the device, the hollow shaft portion being arranged to extend into the open-ended passage of a cartridge received in the cavity, and a plurality of electric heaters spaced apart along the length of the hollow shaft portion, each electric heater comprising at least one heating element for heating the aerosol forming substrate of a cartridge received in the cavity, wherein the hollow shaft portion comprises a plurality of apertures, and wherein each heating element is formed by one or more narrow regions of the hollow shaft portion between adjacent apertures, wherein the plurality of electric heaters are electrically isolated from each other so that each can be heated independently, wherein the hollow shaft portion is at least partially divided into a plurality of electrically isolated sections for coupling the plurality of electric heaters to an electrical power supply, and wherein the electrically isolated sections are electrically isolated from each other by one or more insulating gaps formed in the hollow shaft portion.