What kind of liquid should I use to fill my humidification system?

Regardless of the type of the humidifier, only distilled water should be used. Alternatively special antibacterial humidifier liquids can be used. Otherwise the service life of the humidifier will be reduced by limescale deposits which clog the pores of the humidifier and the risk of germs increases.

When using the old, standard sponge-based humidifiers, the humidification capacity can be improved by the addition of propylene glycol to the humidifier liquid. However, propylene glycol should not be used in modern systems using acryl polymers.