Please note that there is only one NERO filter in this vacuum cleaner - at the inlet. In one of the comments they write that there is a second NERO filter at the outlet, but in fact it is not provided for by the design of the vacuum cleaner. Don't look! However, the air filtration is top notch, very good cleaning. Happy with the vacuum cleaner! The photo shows a diagram sent by master Konstantin from the official service center, proving the absence of a second filter. Thanks to Gorenje hotline for support.