When a fuel defect occurs, the chemical energy of the fuel is not completely converted to heat, reducing combustion efficiency. This raises security concerns that unused fuel may ignite in the chimney and cause an explosion. Boilers must be adjusted to achieve complete combustion. One strategy to ensure complete combustion is to provide extra air. As shown below, a small amount of excess air increases the combustion efficiency, but a large amount reduces the efficiency.

Electric boilers are used in buildings that require very little steam or no access to natural gas. Electric boilers are referred to as clean, quiet, compact, and easy to install boilers. The lack of a combustion process reduces the complexity of design, execution, and maintenance. Heating agents can be easily replaced in case of failure. This type of engine room boiler can be used to generate steam or low pressure or high-pressure water or it can be a good option for those consumers who are limited by gas emission laws. Their size varies from , to , BTU input. In general, its efficiency is % to %.

The presence of large amounts of accumulation of insoluble solids (TDS) in the boiler water can cause sedimentation and reduce the efficiency of the boiler. Therefore, it is necessary to keep the number of solids below the specified limit. As the total hardness increases, the likelihood of sedimentation and sedimentation increases. Drainage of water, called pot immersion, requires the removal of some of the undissolved solids and keeping the total hardness below the rate at which it precipitates. Low but constant and frequent submergence of high doses but rarely is better because it preserves energy, water, and chemicals. Large boilers with a constant load must be continuously submerged where small amounts of water are constantly drawn from the boiler and fresh compensation water is produced.

The burner combines fuel and oxygen to create combustion conditions with the help of a combustion device. This combustion takes place in a combustion chamber and the heat generated is transferred to the heat exchanger water. The controls regulate the combustion process, the ignition rate of the burner, the required fuel, the amount of air required, the water temperature, the steam pressure and the pressure of the engine boilers.

This type of pot or boiler is made up of connecting cast iron pieces called fins. Due to the ability to assemble and disassemble the cast iron boiler, it can be used in spaces where it is not possible to use a steel and integrated boiler. In fact, cast iron boilers are assembled and installed in the engine room. types of sections are used in the construction of each capacity of cast iron boilers, which are as follows.