A fan assembly comprising: a body comprising an inlet, an outlet and means (80, 92) for generating an air flow; a nozzle mountable on the body for receiving the air flow from the body and for emitting the air flow, wherein the nozzle comprises a base which connects to the body and which receives the airflow from the body; and nozzle retaining means for releasably retaining the nozzle on the body, the nozzle retaining means having a first configuration in which the nozzle is retained on the body and a second configuration in which the nozzle is released for removal from the body, wherein the nozzle retaining means is biased towards the first configuration; wherein the nozzle retaining means comprises a manually actuable member located on the nozzle for effecting movement of the nozzle retaining means from the first configuration to the second configuration; wherein the nozzle retaining means comprises biasing means for biasing the manually actuable member towards a position corresponding to the first configuration; wherein the nozzle retaining means comprises a detent which is moveable relative to the nozzle and the body to retain the nozzle on the body in the first configuration, and to release the nozzle for removal from the body in the second configuration; wherein the manually actuable member and the detent are formed as a single component that is pivotably mounted to the nozzle, with the manually actuable member being provided at one end and the detent being provided at the other end, such that pressure on the manually actuable member overcomes the biasing force of the biasing means and causes the manually actuable member and the detent to pivot, such that the detent moves to a position corresponding to the second configuration for removal of the nozzle from the body; and wherein the manually actuable member and the detent of the nozzle retaining means are disposed within the base of the nozzle, and the base of the nozzle comprises an aperture such that the manually actuable member can project through the aperture. a body comprising an inlet, an outlet and means (80, 92) for generating an air flow; a nozzle mountable on the body for receiving the air flow from the body and for emitting the air flow, wherein the nozzle comprises a base which connects to the body and which receives the airflow from the body; and nozzle retaining means for releasably retaining the nozzle on the body, the nozzle retaining means having a first configuration in which the nozzle is retained on the body and a second configuration in which the nozzle is released for removal from the body, wherein the nozzle retaining means is biased towards the first configuration; wherein the nozzle retaining means comprises a manually actuable member located on the nozzle for effecting movement of the nozzle retaining means from the first configuration to the second configuration; wherein the nozzle retaining means comprises biasing means for biasing the manually actuable member towards a position corresponding to the first configuration; wherein the nozzle retaining means comprises a detent which is moveable relative to the nozzle and the body to retain the nozzle on the body in the first configuration, and to release the nozzle for removal from the body in the second configuration; wherein the manually actuable member and the detent are formed as a single component that is pivotably mounted to the nozzle, with the manually actuable member being provided at one end and the detent being provided at the other end, such that pressure on the manually actuable member overcomes the biasing force of the biasing means and causes the manually actuable member and the detent to pivot, such that the detent moves to a position corresponding to the second configuration for removal of the nozzle from the body; and wherein the manually actuable member and the detent of the nozzle retaining means are disposed within the base of the nozzle, and the base of the nozzle comprises an aperture such that the manually actuable member can project through the aperture.