Now it says dust class H, which is very misleading. According to Körcher, as @OldEngineer has already written above, it is not classified, so it may be better not to specify anything than to specify something wrong. But I was pleased to find such a cheap vacuum cleaner with classification.

I can't say too much about that... I now have the 3 Kärcher hoover... but the higher dust filtration is then even more expensive... and whether wet hoovers are available in the higher category?
You would have to ask the Kärcher company directly.
I am satisfied with my current hoover... good value for money
Best regards Christian