WNS type condensing gas, steam boiler is red based on 20 years of oil and gas boiler R & D, manufacturing experience, analyzes and summarizes the relationship between flue gas and water vapor condensation rate and temperature of exhaust gas, condensation rate and thermal efficiency and condensed water of different kinds of steel corrosion rate results based on, the flue gas condensation technique, the successful launch of condensing boiler products. The energy saving effect of WNS type gas condensate high efficiency steam boiler is more obvious, and the thermal efficiency is more than 100%. At the same time, some harmful substances in the flue gas condensate in the condensate, can play a role in the purification of flue gas, so this product has played a dual role in energy saving and emission reduction. Product specifications and models of steam 4T, 2T, 6T, 8t, 10t, etc..