An aerosol provision device is described. One such device includes a heater assembly arranged to receive aerosol generating material. The heater assembly has a susceptor which is heatable by penetration with a varying magnetic field. A fluidly sealed enclosure extends around at least part of the heater assembly defining a fluidly sealed cavity between the enclosure and the susceptor. An inductor coil extends around the enclosure. The inductor coil generates the varying magnetic field.