An active field polarized media gas cleaning device comprising at least: - a first electrode and a second electrode , - a filter medium with a first side and a second side , wherein the first side faces the first electrode and the second side faces the second electrode , - a corona discharge electrode , located at a distance from the first electrode , wherein the first electrode is in between of the corona discharge electrode and the first filter medium , - a power source , wherein the gas cleaning device is configured to electrically connect: - the first electrode to a first output port of the power source wherein the first output port of the power source provides a first electrical potential U 1 and - the corona discharge electrode to a second output port of the power source , wherein the second output port of the power source provides a corona potential U c , wherein the corresponding potential difference U c - U 1 is referred to as corona voltage and to apply a potential difference U 1 - U 2 across the first electrode and the second electrode to obtain active field polarized media air cleaning, wherein U 2 is the electrical potential of the second electrode , characterized in that - the gas cleaning device has no more than these three electrodes (30, 31 32) and is configured to use the first electrode simultaneously as an electrode in the corona discharge circuit as well as an electrode of the active filed polarized filter medium . - a first electrode and a second electrode , - a filter medium with a first side and a second side , wherein the first side faces the first electrode and the second side faces the second electrode , - a corona discharge electrode , located at a distance from the first electrode , wherein the first electrode is in between of the corona discharge electrode and the first filter medium , - a power source , wherein the gas cleaning device is configured to electrically connect: - the first electrode to a first output port of the power source wherein the first output port of the power source provides a first electrical potential U 1 and - the corona discharge electrode to a second output port of the power source , wherein the second output port of the power source provides a corona potential U c , wherein the corresponding potential difference U c - U 1 is referred to as corona voltage and to apply a potential difference U 1 - U 2 across the first electrode and the second electrode to obtain active field polarized media air cleaning, wherein U 2 is the electrical potential of the second electrode , - the first electrode to a first output port of the power source wherein the first output port of the power source provides a first electrical potential U 1 and - the corona discharge electrode to a second output port of the power source , wherein the second output port of the power source provides a corona potential U c , wherein the corresponding potential difference U c - U 1 is referred to as corona voltage and to apply a potential difference U 1 - U 2 across the first electrode and the second electrode to obtain active field polarized media air cleaning, wherein U 2 is the electrical potential of the second electrode , characterized in that - the gas cleaning device has no more than these three electrodes (30, 31 32) and is configured to use the first electrode simultaneously as an electrode in the corona discharge circuit as well as an electrode of the active filed polarized filter medium . - the gas cleaning device has no more than these three electrodes (30, 31 32) and is configured to use the first electrode simultaneously as an electrode in the corona discharge circuit as well as an electrode of the active filed polarized filter medium . <EOS>