An emanation system is described comprising and emanation device and a replaceable refill of liquid, wherein the refill comprises: a sealed reservoir of a liquid containing one or more active materials wherein the active material comprises at least ona of: a fragrance; an insecticide; a fungicide; a pesticide; a sanitizing material; and/or a pharmaceutical; a porous wick having a length which extends from the interior of the reservoir to the exterior thereof; a reservoir seal having at least one aperture through which the porous wick extends; and a hollow liquid conduit housed within the wick having a length substantially identical to the wick; and wherein tha device comprises: an air pump; a fluid conduit In fluid communication with tha air pump such that, in use, air pumped by the pump will flow through the fluid conduit; a nozzle located at the end of the fluid conduit remote from tha air pump; a elector constriction provided in the fluid conduit adjacent or substantially adjacent the nozzle; a liquid conduit engaging member provided adjacent the ejector constriction and in fluid communication with the fluid conduit at one end thereof, and configured at the other end to, In use, engage the hollow liquid conduit in the refill.