An assembly for evaporating a volatile fluid 202, the assembly comprises a device 1 and a refill 2 which are detachable from one another wherein the device 1 comprises a magnetic induction coil 103 configured to operate with an alternating current passed therethrough at a frequency of between 20KHz and 500KHz, and one or more volatile fluid emanation channels 105 containing at least one piece of aluminium foil and/or deposited aluminium and wherein the refill 2 comprises at least one magnetic susceptor 204 having a coercivity of 50 ampere/metre (HC) to 1500 ampere/metre (HC) , and a substantially liquid-tight sealed reservoir 201 containing the volatile fluid 202 wherein, in use, the magnetic susceptor(s) 204 is arranged to heat the material 202 predominately by magnetic hysteresis when the magnetic susceptor(s) 204 is at least partially positioned in the induced magnetic field generated when said alternating current is passed through the induction coil 103. The device itself and a method for evaporating a volatile fluid with such an assembly are also claimed.
