One should follow the recommendation of Dyson, and wash the pre-motor filter regularly. Soon you forget thereby controlling the HEPAs, the Nachmotorfilters sitting under the dust collector, and also, from the beginning blossom white especially on the underside over gray to black, over time the need for his presence;) shows, however, therefore, that he does not! Lifetime filter.
As I said initially, eventually comes the time of the exchange, and, although I really do not euro cent pincher am now :), I have decided for the "Noname" product. My first impression
+ Looks kind of like everything from Dyson)
and my experience means time for this are:
+ Good quality (at least externally can actually see no difference to Dyson)
+ Pre-motor filter as well as the original washable
+ Filter fit exactly
Although the capacity of the vacuum has apparently not abated, you will be taught a lesson immediately after cleaning / changing the filters. And for this kind of teaching I can set this up to now only 5-star standard recommended :)
Note .:
The original Dyson for example, the DC29 are currently at amazon: pre-motor filter, post-motor or filter fabric (H level).