Dry filter with enhanced separation output and convenient dimensions

Dry filter apparatus adapted to separate dry (1) dust and other dispersible substances from industrial exhaust gases and from dust laden air in underground mine and tunnel construction, having a plurality of filter housings (2, 3) and wherein each filter housing includes a raw gas duct (5) a clean gas duct (6) and filter elements (9, 10, 11) connected to partition walls (8) and integrated with regard to the filter housing and a discharge unit (12) of filtered dust, and a ventilating fan (50) for transporting air, wherein the raw gas duct (5) and the clean gas duct (6) are arranged horizontally one above another in each filter housing (2, 3) and are separated by a partition wall (8) that runs through each filter housing and forms a part of each filter housing and is sloping upwards from a raw gas inlet (21) in the direction of a clean gas discharge (22) to a roof (23) of a first filter housing to a bottom of a last filter housing of each filter housing (2, 3), whereby each filter elements (9, 10, 11) are connected with the partition wall (8) and frame construction (17) of each filter housing (2, 3), wherein a bottom of the raw gas duct comprise a grating, and each filter housing comprise part housings connected together.