A shisha device (10, 100) comprising: an aerosol-generating element for receiving an aerosol-forming substrate; a vessel spaced from the aerosol-generating element and defining an interior for housing a volume of liquid, the vessel comprising a head space outlet; and an aerosol conduit (21, 31, 121, 400) positioned between the aerosol-generating element and the interior of the vessel, the aerosol conduit (21, 31, 121, 400) comprising: a proximal end portion defining a proximal opening (24, 25, 124) positioned to receive airflow from the aerosol-generating element; a distal end portion defining a distal opening (26, 27, 126) positioned in the interior of the vessel; and a ventilation opening (30, 32, 130, 206, 306) positioned between the proximal and distal end portions, wherein a ratio between the total aperture area of the ventilation opening (30, 32, 130, 206, 306) and a transverse cross-sectional area of the aerosol conduit (21, 31, 121, 400) positioned proximate to the ventilation opening (30, 32, 130, 206, 306) is at most 1:1000; wherein applying a negative pressure at the head space outlet causes airflow through the aerosol conduit (21, 31, 121, 400) from the proximal opening (24, 25, 124) to the distal opening (26, 27, 126) and causes ambient air to flow from the ventilation opening (30, 32, 130, 206, 306), through the aerosol conduit (21, 31, 121, 400), to the distal opening (26, 27, 126) of the aerosol conduit (21, 31, 121, 400). an aerosol-generating element for receiving an aerosol-forming substrate; a vessel spaced from the aerosol-generating element and defining an interior for housing a volume of liquid, the vessel comprising a head space outlet; and an aerosol conduit (21, 31, 121, 400) positioned between the aerosol-generating element and the interior of the vessel, the aerosol conduit (21, 31, 121, 400) comprising: a proximal end portion defining a proximal opening (24, 25, 124) positioned to receive airflow from the aerosol-generating element; a distal end portion defining a distal opening (26, 27, 126) positioned in the interior of the vessel; and a ventilation opening (30, 32, 130, 206, 306) positioned between the proximal and distal end portions, wherein a ratio between the total aperture area of the ventilation opening (30, 32, 130, 206, 306) and a transverse cross-sectional area of the aerosol conduit (21, 31, 121, 400) positioned proximate to the ventilation opening (30, 32, 130, 206, 306) is at most 1:1000; a proximal end portion defining a proximal opening (24, 25, 124) positioned to receive airflow from the aerosol-generating element; a distal end portion defining a distal opening (26, 27, 126) positioned in the interior of the vessel; and a ventilation opening (30, 32, 130, 206, 306) positioned between the proximal and distal end portions, wherein a ratio between the total aperture area of the ventilation opening (30, 32, 130, 206, 306) and a transverse cross-sectional area of the aerosol conduit (21, 31, 121, 400) positioned proximate to the ventilation opening (30, 32, 130, 206, 306) is at most 1:1000; wherein applying a negative pressure at the head space outlet causes airflow through the aerosol conduit (21, 31, 121, 400) from the proximal opening (24, 25, 124) to the distal opening (26, 27, 126) and causes ambient air to flow from the ventilation opening (30, 32, 130, 206, 306), through the aerosol conduit (21, 31, 121, 400), to the distal opening (26, 27, 126) of the aerosol conduit (21, 31, 121, 400).