[. . . ] [. . . ] 3 4 Water : Vinegar 1:1 1 Hour 5 6 7 8 HU4803 5 6 9 10 Replace the humidifying filter every three months and the anti-bacteria filter every year. E subject to change without notice ©2012 Koninklijke Philips Electronics N. [. . . ] [. . . ]