Engineering systems maintenance is essential for safe and uninterrupted building operation. It includes servicing of heating, water supply, sewage, ventilation, electrical, and low-current systems. Regular maintenance helps detect wear and prevent emergency situations. The service is relevant for private houses, apartment buildings, offices, shopping centers, and industrial facilities. Engineering maintenance covers inspections, adjustments, repairs, and technical documentation. System efficiency and energy optimization are key aspects of proper servicing. Maintenance can be provided under long-term service contracts or on-demand. Professional servicing extends the lifespan of building systems. This approach ensures reliable and efficient building operation over time.