Based on over a decade of experience in boiler R&D and manufacturing, Yudong has successfully launched the integrated low-nitrogen condensing boiler product. The **WNS-type condensing boiler** features more significant energy-saving effects (with thermal efficiency exceeding 100%), superior environmental performance via low-nitrogen combustion, which effectively reduces nitrogen oxide emissions to below 30mg.  
STRUCTURAL FEATURES  
1. Horizontal full wet-back structure, with compact overall layout and elegant appearance.  
2. External integrated finned-tube economizer and external independent condenser, featuring compact structure and easy maintenance.  
3. Rational heating surface structure design to effectively control flue gas resistance.  
4. Variable-frequency water supply and control technology adopted to ensure the condensation rate of water vapor in flue gas.  
5. The condenser uses special steel resistant to sulfuric acid and low dew point corrosion, greatly extending its service life.  
6. Intelligent control system with dual manual and automatic modes, combining Programmable Logic Controller (PLC), touch screen, and additional buttons.
7. Equipped with comprehensive online help, multi-level Chinese pop-up menus, and fault maintenance guidelines, greatly facilitating user operation and maintenance.  
8. Comprehensive safety interlock protection functions to ensure safe and efficient operation of the boiler.  
9. The PLC is provided with sufficient reserved ports and modular expansion modules, enabling group control, remote monitoring, and building control. This reduces repeated investment for the development of user-specific needs.  
10. When multiple boilers are used in a network, the system can automatically select the number of operating boilers and distribute the load of each boiler without the need for a main control console.