An emanator (24, 60) for a volatile material comprises an elongate element having a first plurality of fibres (12, 68) distributed along its length and extending therefrom or substantially perpendicular thereto. The emanator further comprises a fluid pathway for the conveyance of volatile material along the emanator. The pathway comprises one or more second fibres (14, 64) substantially extending in a direction along the length of the element. A system (22, 72) for releasing a volatile material into a room comprises at least one such emanator, a fluid reservoir (26, 74) for a volatile material and a fluid delivery system (28, 76) for delivering fluid from the reservoir to the emanator一種用於揮發性材料之散發器(24、60)包括一細長元件,該細長元件具有第一複數個纖維(12、68),該第一複數個纖維沿該細長元件之長度分佈且自該細長元件延伸或大體上垂直於該細長元件。該散發器進一步包括用於沿該散發器運送揮發性材料的一流體途徑。該途徑包括一或多個第二纖維(14、64),該一或多個第二纖維大體上在沿該元件之長度的方向上延伸。一種用於將揮發性材料釋放至房間中的系統(22、72)包括:至少一個此散發器、用於揮發性材料之一流體貯存器(26、74),以及用於將流體自該貯存器輸送至該散發器的一流體輸送系統(28、76)。