The unit only humidifies the air, but it is a nebuliser and I had a visible layer of limescale on all the furniture every day (so should only be used with decalcified water). Also, cleaning the unit is extremely time-consuming. It is the only one of my Dyson products that I discarded after one winter. I found it unusable - in contrast to the fan heaters, fans or the hair dryer.

The unit does not purify the air.