There is provided an aerosol generating system, the system comprising: aerosol generating means； aerosol delivery means； and an aerosol guiding device. The aerosol guiding device comprises a chamber having an air inlet and an air outlet and the aerosol delivery means is configured such that aerosol is introduced from the aerosol generating means into the chamber in use. An airflow route is defined from the air inlet to the air outlet so as to convey the aerosol to the air outlet, and the relative dimensions of the air inlet and the air outlet are selected to provide pressure control means for controlling the pressure differential between the air inlet and the air outlet. There is also provided an aerosol guiding device for use in an aerosol generating system, the device comprising: a chamber having an air inlet and an air outlet.
