Design of flue gas cleaning systems is a specialized engineering service aimed at environmental protection and regulatory compliance. The design process focuses on reducing harmful emissions released into the atmosphere. Solutions are developed based on fuel type, system capacity, and technological processes. Designs may include cyclones, filters, scrubbers, electrostatic precipitators, and other emission control technologies. Compliance with emission limits and accurate monitoring is a key design aspect. Projects also integrate ventilation, automation, and control systems. Flue gas cleaning systems are widely used in boiler houses, industrial plants, energy facilities, and manufacturing processes. Proper engineering significantly reduces environmental impact and operational risks. Such systems form the backbone of sustainable and responsible industrial operation.