Abstract: A purification arrangement for purifying a contaminated gaseous medium comprising: an ionizing equipment for ionizing air; a supply pipe for the supply of contaminated air; and at least one mixing chamber, wherein the contaminated air is fed through the mixing chamber in a main flow and ionized air is added to the main flow; an inlet for introducing ambient air into the main flow of the contaminated gaseous medium prior to the mixing chamber; a first temperature sensor arranged in the supply pipe prior to the inlet and configured to detect the temperature of the contaminated gaseous medium; wherein if the temperature of the contaminated gaseous medium detected by the first temperature sensor is above 70° C., ambient air is added through the inlet into the main flow.