Cold steam: tap water, mineral water and distilled water are suitable. If your water is hard, a white deposit will form around the device. This is the limescale in the water breaking into tiny particles and falling back down next to the device. There is no risk to your health, however, you must ensure that you clean your humidifier well so that it does not scale up. It is also possible to use a mixture of tap water and mineral water. To reduce this white dust, it is advisable to regularly replace the humidifier's filter cartridge.
Warm steam: tap water, mineral water and distilled water are suitable. Just like hot steam humidifiers, water from a softener is strongly discouraged.
Hot steam: tap water is suitable, but softened water from a descaling system using salt should be excluded. The boiling point of the water will be transformed, causing an overflow and then a deformation of the humidifier.
Evaporator: any type of water. Ideal if the water is very hard. The hard water will remain at the bottom of the tank and can simply be cleaned with a suitable product (white vinegar for example).
