An air treatment apparatus comprising: a housing defining an air flow path between an inlet and an outlet an air flow impeller arranged for inducing a flow of air through said air flow path and an electrode assembly suspended within the air flow path and orientated transverse to the induced air flow path wherein the electrode assembly is configured to operably generate a plasma discharge circumferentially about a longitudinal axis of the electrode assembly and within which particles or constituents of air within the induced air flow will be exposed to the plasma.
