The function of this humidifier is clearly reflected in its design. Defined by round shapes and flowing lines, it skilfully ­places the element of water itself centre stage. AirProce STORM AH-220 works quickly and effectively with a capacity of 1.5 l / h and a sterilisation rate of 99.9 per cent. The water tank and the filter have been isolated from one another to keep the filter dry and prevent bacterial growth in the water.