Shaanxi Deli Energy Technology Co., Ltd. (Fandel Boiler Factory) has established a gas-fired fully premixed condensing low-nitrogen boiler testing laboratory on its premises, with emissions capable of reaching below 30mg. Customers can visit for on-site operation experience. The company is equipped with its own testing instruments for on-site emission testing and result verification. Fandel Brand Fully Premixed Condensing Low-Nitrogen Variable Frequency Boiler: Low Nitrogen and Eco-Friendly NOx < 8mg/m3. Utilizes fully premixed combustion and surface micro-flame combustion technology, ensuring an adequate amount of oxygen beside each combustion molecule for complete combustion, avoiding incomplete combustion that produces CO. This results in significantly reduced NOx emissions. Ultra Energy-Efficient Net hot water efficiency of 103%–108%, exceeding that of ordinary boilers by over 30%. Features high-efficiency heat exchange design, extensive heating surface layout, long flue gas travel combined with multi-pass heat exchange, and latent heat recovery condensation technology. With a small water capacity, it heats up in one second and boasts extremely high thermal efficiency. Compact Size A 770kW boiler is only the size of a refrigerator, occupying just 1.2㎡. Modular design allows for multi-unit linkage control. Simple operation with user-friendly intelligent display. Ultra Quiet Built-in burner acts as a soundproofing device. Metal fiber surface combustion employs micro-flame technology, significantly reducing combustion noise and simultaneously minimizing flue noise. Long Lifespan Made of alloy steel material, offering oxidation resistance and stronger resistance to acid and alkali corrosion compared to copper and lead. Specially treated to prevent scale buildup, with a service life of over 30 years. Enhanced Safety Sealed combustion with no open flame, resistant to airflow interference. Comprehensive safety protections include gas pressure, air pressure, water flow, and flame monitoring. Equipped with an intelligent self-diagnostic system and remote monitoring functionality.