Abstract: A head wearable air purifier includes a headgear, an air purifier assembly supported by the headgear, a nozzle assembly and a mask body. The air purifier assembly includes a filter and an airflow generator for generating an airflow through the filter. The nozzle assembly is configured to extend in front of a face of a wearer in use. The nozzle assembly includes an inlet aperture configured to receive a filtered airflow from the air purifier assembly, and an air outlet for emitting the filtered airflow from the nozzle assembly. The mask body detachably connects to the nozzle assembly and defines a cavity for receiving a mouth and/or nose of the wearer. The cavity is in fluid communication with the air outlet.

Abstract: There is provided a filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising a filter frame arranged to support one or more filter media. The filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge. The first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly.

Abstract: There is provided a fan assembly comprising a fan body comprising a first air inlet and a second air inlet, the first air inlet and the second air inlet being provided on opposing halves of the fan body. The fan assembly also comprises a first filter assembly mounted on the fan body over the first air inlet, and a second filter assembly mounted on the fan body over the second air inlet. The fan body further comprises a first retention assembly that is configured to releasably engage both the first filter frame and the second filter frame, and a second retention assembly that is also configured to releasably engage both the first filter frame and the second filter frame.

Abstract: There is provided a fan assembly comprising a fan body comprising a first air inlet and a second air inlet, the first air inlet and the second air inlet being provided on opposing halves of the fan body. The fan assembly also comprises a first filter assembly mounted on the fan body over the first air inlet, and a second filter assembly mounted on the fan body over the second air inlet. The fan body further comprises a first retention assembly that is configured to releasably engage both the first filter frame and the second filter frame, and a second retention assembly that is also configured to releasably engage both the first filter frame and the second filter frame.

Abstract: There is provided a filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising a filter frame arranged to support one or more filter media. The filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge. The first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly.