The present invention relates to a device for cleaning exhaust gases from a fireplace, comprising a housing which accommodates functional components of the device, an inlet portion provided to receive exhaust gases from the fireplace, an outlet portion provided to discharge exhaust gases from the device, a bypass portion which is configured to establish a direct connection between the inlet portion and the outlet portion and which can be closed by means of a first mechanical flap arrangement, and a cleaning portion which extends between the inlet portion and the outlet portion for guiding an exhaust gas flow and is provided with a plurality of functional components, wherein the functional components at least comprise an electrostatic filter unit for separating fine dust particles, a centrifugal separator unit for removing particles from the exhaust gas, and a fan unit for driving a flow of the exhaust gas through the cleaning portion.

A system for the treatment of fats, such as those that can be carried preferably in fumes or fumes products, in a kitchen or food industry installation, and which can be linked to the extraction and/or conduction installation of said fumes, comprising at least a source (4) of UV radiation, which can be UVA and preferably of a wavelength of 315 to 380 nm, preferably of a laser type, pulsed light or LED (for example a LED of gallium nitride). Sources are preferably placed on the wall or ceiling of the flue, so that they are accessible from the outside.