A method and device are provided for volatilizing active and/or aroma materials for releasing an inhalable aerosol, wherein a fluid flows through a flow channel in a preferably cylindrical hollow body, wherein the fluid in the flow channel entirely or in part flows through at least one vaporizer membrane in a fluid stream, wherein the at least one vaporizer membrane has been and/or is wetted with a substance containing an active and/or aroma material to be vaporized, and wherein the fluid additionally contains thermal energy and vaporizes the substance on flowing through the vaporizer membrane and supplies the vaporized substance to the fluid stream.
