andreas.haas499 years ago+132Can the dyson produce warm air and cool air?How regularly must the filter be changed and how much does a filter cost?Brimstone9 years ago022No, the device can not actively cool or heat, it's more like a regular fan but with cleaning air feature. The filter has to be changed once a year or after 4382 hours. There is an indicator on the display for that. Optional filters for retail market are not produced yet, they may be available in Spetember/October. So a price is not known yet either.Comment