Fan

1. A fan assembly comprising:

a body comprising an air inlet, an air outlet, and an air flow generator for generating an air flow through the body;

a nozzle removably mounted on the body for receiving the air flow from the body and for emitting the air flow; and

a filter surrounding at least a portion of the body upstream from the air inlet, the filter being held captive on the fan assembly between the nozzle and a portion of the body while remaining free to move relative to the body and the nozzle, wherein the filter is removable from the fan assembly only after removal of the nozzle from the body.

2. The fan assembly of claim 1 , wherein the body comprises a seat for supporting the filter.

3. The fan assembly of claim 2 , wherein the seat comprises an upwardly facing surface for supporting the filter.

4. The fan assembly of claim 2 , wherein the seat is substantially orthogonal to a longitudinal axis of the body.

5. The fan assembly of claim 2 , wherein the body comprises a lower body section and an upper body section and the seat projects outwardly from the upper body section.

6. The fan assembly of claim 5 , wherein the diameter of the lower body section is larger than the diameter of the upper body section.

7. The fan assembly of claim 6 , wherein an outer edge of the seat is substantially flush with an outer surface of the lower body section.

8. The fan assembly of claim 5 , wherein the lower body section comprises an oscillating mechanism for oscillating the upper body section relative to the lower body section.

9. The fan assembly of claim 1 , wherein the filter is tubular and surrounds at least a portion of the body.

10. The fan assembly of claim 8 , wherein the filter extends 360° around the body.

11. The fan assembly of claim 1 , wherein the filter extends radially around at least a portion of the body.

12. The fan assembly of claim 5 , wherein when the filter is on the seat, an outer surface of the filter is substantially flush with an outer surface of the lower body section.

13. The fan assembly of claim 1 , wherein the filter comprises a filter media comprising a HEPA filter.

14. The fan assembly of claim 1 , wherein the filter comprises a filter media comprising an activated carbon cloth.

15. The fan assembly of claim 1 , wherein the filter comprises a perforated shroud surrounding a filter media of the filter.

16. The fan assembly of claim 1 , wherein the nozzle defines an opening through which air from outside the fan assembly is drawn by the air emitted from the nozzle.

17. The fan assembly of claim 1 , further comprising at least one sealing member for forming a seal between the filter and at least the body to define a flow path between a downstream surface of the filter and the air inlet of the body.

18. The fan assembly of claim 17 , wherein the at least one sealing member is provided on the nozzle.

19. The fan assembly of claim 17 , wherein the at least one sealing member is provided on the body.

20. The fan assembly of claim 17 , wherein the at least one sealing member comprises a first sealing member provided on the body and a second sealing member provided on the nozzle.

21. The fan assembly of claim 17 , wherein the at least one sealing member is provided on the filter.

22. The fan assembly of claim 21 , wherein the filter is provided with at least two sealing members.

23. The fan assembly of claim 2 , wherein a lower seal member is provided adjacent the seat for forming a seal against a bottom surface of the filter.

24. The fan assembly of claim 17 , wherein an upper seal member is provided on the nozzle for forming a seal against an upper surface of the filter.