Hello Anonymous
Personally, I would not attach a fine dust filter. As long as you use original toner, I don't think there is any reason to. I think the manufacturers are very aware of the issue and cannot afford bad publicity. Generally, Tesa offers appropriate filters. You have to find out for yourself whether there is a suitable one for this model.
The ventilation opening where warm air escapes is on the right side of the unit and measures approx. 9 x 8 cm (w x h).
My personal experience: If the place of installation is already dirty, more dirt will automatically collect in the filter :-) / If the place is clean and well-maintained, the filters are usually only slightly dirty. = They simply filter the air in the room...
Greetings

Thank you, I will try it without the filter. New machine, original toner... Tesa doesn't have anything suitable for the model, maybe because it works well without it. :-)