An aerosol-generating system comprising: an aerosol-generating article (1), the aerosol- generating article comprising a single metered dose of an aerosol-forming substrate; an airflow pathway (108) arranged between an air inlet (110) and an air outlet (112); an aerosolisation chamber (116) arranged at a location along the airflow pathway (108) such that the airflow pathway passes through at least a portion of the aerosolisation chamber (116); and a flow controller (122, 124) for selectively controlling the flow of air through the airflow pathway (108), the flow controller (122, 124) having an open configuration in which air can flow into and out of the aerosolisation chamber (116) and a closed configuration in which air is substantially prevented from flowing into and out of the aerosolisation chamber (116); wherein the aerosolisation chamber (116) is configured to open to receive only one aerosol-generating article (1) at a time; wherein the aerosolisation chamber (116) is configured to close to contain the aerosol-generating article (1); the aerosol-generating system further comprising a heating element (118, 120) arranged to heat the aerosolisation chamber (116) when an aerosol- generating article (1) is received within the aerosolisation chamber (116); wherein the aerosol-generating system is configured to heat the aerosolisation chamber (116) containing the aerosol-generating article (1) only when the flow controller (122, 124) is in the closed configuration.La présente invention concerne un système de génération d'aérosol comprenant : un article de génération d'aérosol (1), l'article de génération d'aérosol comprenant une seule dose mesurée d'un substrat de formation d'aérosol; un trajet d'écoulement d'air (108) disposé entre une entrée d'air (110) et une sortie d'air (112); une chambre d'aérosolisation (116) disposée à un emplacement le long du trajet d'écoulement d'air (108) de telle sorte que le trajet d'écoulement d'air passe à travers au moins une partie