An assembly adapted to evaporate a volatile fluid having a device and a refill which are detachable from one another:the device includes a magnetic induction coil configured to operate with an alternating current passed therethrough at a frequency of between substantially 20 KHz to substantially 500 KHz and a volatile fluid transport part receiving area containing at least one piece of heat-conducting, non-magnetic metal foil and/or deposited heat-conducting, non-magnetic metaland the refill includes a reservoir for the volatile fluid, a volatile fluid transport part to draw the fluid from the reservoir, and at least one magnetic susceptor having a coercivity of substantially 50 ampere/meter (HC) to substantially 1500 ampere/meter (HC). arranged to heat the wick predominately by magnetic hysteresis when an alternating current is passed through the induction coil, such that when the refill is attached to the device at least one magnetic susceptor is at least partially located within the volatile fluid transport part receiving area. Refills, devices and methods of operation are also described.
