After this old vacuum cleaner then gave up the ghost, I bought a vacuum cleaner with a HEPA filter. I can only say that there is a difference like night and day.
I want you to draw attention to the rubber seal on the bottom outside of the filter (s photo:. Black). This detail is extremely important in this filter. Replicas sometimes do not fit exactly into the space provided, and thus the filter effect will be lost. Therefore, it makes perfect sense in this case to use the original.
On the bottom side is also still an activated carbon layer. This filters out bad smells, so that really flows out only fresh, clean air. Out of habit I have done so in a citrus scent in the vacuum cleaner bag, and was amazed than ever penetrated no scent outwards.
The with the dust I can not test course itself. But I have not the means. However, there are indications that really smallest particles are filtered out by the HEPA filter. I used to often reduced after vacuuming sneeze, especially when I got the air flow in the face. In this filter, nothing happens.
The filter should be replaced according to the manufacturer so about once a year. However, it is not mentioned in which use. Someone vacuums daily, has probably often change the filter, as someone who once sucked the week dust. Then there is also a question of how much square one sucks.
So, this is once a year rather Wisschiwaschi.
I think if it no longer smells as clean or anfangt to sneeze her, is it high time.
And one last comment. The seller of the cleaner told me that one with a (suitable) HEPA filter can equip almost all Miele vacuum cleaners.
