Air treatment device comprising aplasma coil electrostatic precipitator assembly. The present invention relates to an air treatment device comprisinga plasma generatorelectrostatic precipitator assemblycomprising: an electrostatic precipitator configured to charge airborne particles in the vicinity of theelectrostaticprecipitatorto provide charged airborne particles and a plasma generatorpositionedin proximity to the electrostatic precipitator and configured for cooperation with the electrostatic precipitator the plasma generatorconfigured todischarge plasma and provide an inactivation zone in the region of the plasma generator operable to inactivatethe airborne particles and wherein the air treatment device comprises means for directing the charged airborne particles generated by the electrostatic percipitator into the inactivation zone such that the air treatment device is adapted to generate charged airborne particles and then immediately todirect the charged airborne particles into the inactivation zone so as to expose the charged airborne particles to plasmain the inactivation zone. (Figure 13)
