Oil/gas boilers refer to boilers that use oil or gas as fuel (such as natural gas, biogas, blast furnace gas, liquefied petroleum gas, diesel, light oil, etc.), and can be divided into steam boilers and hot water boilers according to their functions. All adopt a large furnace design, with a thermal efficiency of over 100% and NOx emissions as low as 30mg/Nm3; Both the front and rear smoke boxes adopt self-developed sealing structure to ensure that the smoke box does not leak smoke; It also has the characteristics of fully automatic and safe operation.