ZOZEN normal pressure gas boiler is a horizontal wet-back type fire tube boiler, which adopts a large-threaded smoke tube and a corrugated furnace to increase the radiant heat absorption, strengthen the heat transfer effect and save fuel consumption, to achieve the goal of energy saving and consumption reduction. At the same time, the normal pressure gas-fired hot-water boiler adopts an intelligent control system, equipped with various safety interlocks such as overheat protection, protection against dry burning and water shortage, and leakage protection, which can supply heat and water stably for a long time.