is understood that the positioning and directions of the air intake and air exhaust areas relative to the surfaces of the chair and the user can be changed and varied this is also true for the other components of the particular negative ion generator that is selected for use with the present invention an exemplary embodiment of the ion generator 18 having a structure adapted for mounting within a headrest 20 of the chair system 10 is shown in fig3 to 7 fig3 is an exploded perspective view of the components of the exemplary ion generator 18 and headrest 20 the ion generator 18 is shown having an ion grid 34 a fan 36 and a transformer 38 which correspond to the same components described for fig1 a to 2 b the ion generator also includes an air intake port 40 an air ducting 42 and air exhaust ports 44 the ion generator is also shown having air ducting caps 46 which serve to enclose recesses within the air ducting 42 thereby forming channels for air to pass through with respect to he headrest 20 it is shown having a seating surface cover 48 which faces the user when the user is sitting in.