CARTRIDGE FOR AN AEROSOL-GENERATING SYSTEM

There is provided a cartridge for an aerosol-generating system. The cartridge includes a housing for holding an aerosol-forming substrate, the housing having an opening, and a heater assembly. The heater assembly includes at least one heater element fixed to the housing and extending across the opening of the housing. The at least one heater element defines a plurality of apertures for allowing fluid to pass through the at least one heater element, the plurality of apertures having different sizes. There is also provided a cartridge in which the at least one heater element comprises an array of electrically conductive filaments extending along its length and a plurality of transverse filaments extending transversely to the electrically conductive filaments. At least some of the transverse filaments extend across only part of the width of the at least one heater element and are staggered along the length of the at least one heater element.