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The effects of the pressure and temperature of airflow were experimentally investigated toimprove the performance of a nozzle-type electrostatic eliminator. The pressure (AP) and the temperature (AT) of the airflow toward the needle electrode were controlled in the ranges of 0 Mpa to 0.3 Mpa and of 25C to 125C, respectively. It was confirmed that the ion-generation ability was increased depending on the magnitude of the AP and the AT of the airflow provided to the surrounding rostatic eliminator. In addition, it was clear that the mixed effect of the AP and the AT of the airflow was large. These results were attributed mainly to (1) the activation of the corona discharge by the AT, (2) the change of the decomposition and production of a suppression gas by the ATelectrode by the AP, and (4) the change of the distribution of the current densities on the needle electrode by the AP.