Currently, the fuel used in condensing gas hot water heating boilers is primarily natural gas, which is a high-quality fuel. In the actual working process, it also adheres to the principles of energy conservation and energy conversion. That is, the mechanism and transformation of energy aim to facilitate fuel combustion. During the combustion process, oxygen is indispensable. Based on the current operational conditions of most boilers, the oxygen required for combustion comes from the external air.

      After natural gas and oxygen molecules mix, the natural gas molecules combine with the oxygen molecules. Both possess a certain temperature, meaning that the molecules participating in the combustion reaction themselves store a certain amount of energy. This energy is sufficient to enable these molecules to overcome the internal forces between them, so that when the molecules collide, they can break the bonds of the initial substances and then form stable new bonds, ultimately leading to the generation of reaction products.

      From a strict analysis of the energy conservation theorem, the total energy q released by the gas entering the condensing gas hot water heating boiler system is theoretically equal to the total energy discharged by the boiler system. This includes the heat absorbed by the boiler water q1, the heat absorbed by the circulating water q2, the incomplete combustion loss q3, heat dissipation q4, and flue gas emission q5. That is, q = q1 + q2 + q3 + q4 + q5. The variation in total heat value needs to be adjusted according to the actual operating state of the condensing gas hot water heating boiler and the different changes in the return water temperature or outlet water temperature cycle. From this process, it can be understood that the delivery amounts of gas and air should be appropriately adjusted based on the changes in the required total heat to improve the combustion efficiency of natural gas.