Electronic cigarette and capsule for an electronic cigarette

An electronic cigarette comprising an inhaler body and a removable capsule, wherein the inhaler body comprises a power unit, a control circuitry and a capsule seating configured to connect with the capsule, the capsule comprising:

• a liquid store configured to contain a liquid to be vaporized,
• a vaporization chamber,
• a vapor outlet,
• a vaporizing unit comprising a heating element and a fluid transfer element, wherein the fluid transfer element has a liquid uptake portion located inside the liquid store and a liquid delivery portion in contact with the heating element inside the vaporization chamber,
• a main vapor flow channel extending from the vaporization chamber to the vapor outlet via a tube or chimney, and
• a seal configured to sealingly connect the vaporization chamber and the tube or chimney to form the main vapor flow channel, whereby the seal is additionally configured to compress the fluid transfer element in a radial direction of the fluid transfer element in order to control a flow of liquid into the vaporization chamber;
• wherein the electronic cigarette is configured to power the heating element so as to provide an effective power density of between 0.7 and 1.0 Watt/mm2;
• wherein an effective percentage of a surface area of the heating element in contact with the fluid transfer element is between 20 and 40% of the surface area of a heating wire of the heating element;
• and
• wherein the vaporizing unit is configured to produce aerosol with a vapor density of at least 3.5 mg per 55 ml inhalation.