Features of CWNS\WNS Series Oil (gas) fired boilers of CWNS and WNS series are designed, manufactured and checked in strict accordance with the relevant provisions in Steam Boiler and Hot Water Boiler Safety and Technical Supervision Regulation to ensure the safe use of the product. The furnace, with a large heating area, is optimized designed. The typical horizontal structure of three backhaul, all wet back can not only raise the thermal efficiency, but also reduce the generation of ox nitride and emission of the harmful substance in smoke and dust. Equipped with automatic control system, the machine can stop automatically and have the sound and light alarm to indicate the cause for failure when it runs abnormally. The product is equipped with the world famous combustor which can automatically adjust the fire according to the load and have the function of flame inspection and automatic blow. Easy to control and environment friendly, it runs with a low cost. Small size, nice, easy installation. The good tightness can reduce the smoke leakage and heat energy loss.