Thanks to the synergy resulting from the combination of a practically maintenance-free electrostatic precipitator with a bag house; very good clean gas dust contents can be achieved at low energy costs. One electrostatic precipitator field alone is capable of eliminating at least 90 % of the dust volume at very low energy consumption. Thanks to the ionisation and agglomeration effect in the electrostatic precipitator section, pressure loss in the hybrid filter is reduced by up to 40 %. And since only 10 % of the cleaning power falls to the fabric filter section, this leads to a marked reduction in compressed air consumption, which significantly extends the service life and maintenance interval of the filter media. This concept is especially adapted to the remodelling of old electrostatic precipitators where the existing casing and the first electrostatic precipitator field can still be used.