For the flat bag filter construction, the length of the filter elements is limited to 2.5 m for horizontal installation and 3.0 m for vertical installation. Compared to other types of construction, this length limitation requires the installation of proportionally more filter elements for a filter surface of the same size; however, it offers significant advantages:nnBetter distribution of cleaning energy over the entire filter surface. Filter bodies can be transported to the construction site with pre-assembled filter elements