Static panel - pocket filters (Demisters) are static multi-stage filtering units with pre-filtering, abatement (by means of inertial separator) and post-filtering sections. The use of regenerable components such as flat or pleated filtering metal wool panels and the sate of condensation of micro oily mist droplets or aerosol considerably limit system management costs. "Pushed" filtering is carried out by glass or polyester microfibre pocket modules, right up to the use of modular absolute filter elements to guarantee maximum filtering efficiency. Limited resistance, lost operating costs and easy maintenance. Automatic control of filtering unit obstruction for correct management and replacement of filtering parts.