Engine room boilers are high-pressure tanks designed to heat water or generate steam that can be used to heat the environment or to heat the building consuming hot water. In the heating of most commercial complexes, the source of heat for the engine room boiler are burners that work by burning natural gas. Diesel burners or fuel oil (rarely) can also be used. In some heating installations, the use of steam is preferred. Such as: absorption cooling systems, kitchens, laundries, disinfectants and steam-powered equipment.

In commercial complexes, the boiler is very different in summer and winter, night and day, working days and weekends. Using a boiler can not apply this load difference well. When the heat generated by the boiler at the lowest ignition rate exceeds the heat required by the building, the boiler cycle will be interrupted. Starting and interrupting the cycle in the boiler is not efficient at all because, in each cycle, a pre-combustion discharge and a post-combustion discharge are performed to direct the heat out of the boiler. Also in the case of boilers that do not perform the adjustment operation, when the combustion efficiency is at its best, the cycle process does not allow the boiler to operate in the second boiler and the ignition rate is constant.

Steel boilers, as their name implies, are made of steel and are usually made of horizontal cylinders. Steel boilers have a combustion chamber in which pipes are placed around this chamber. The pipes that are installed around the combustion chamber of steel boilers are made of a special alloy so that they do not burn or damage in the face of a direct flame. These pipes are called (fire pipes). Steel boilers are divided into friends from the point of view of heat transfer, which are as follows.

Modular boilers are small in size and capacity and are usually used to replace several small boilers instead of one large boiler. These modular boilers pass through standard ports and are portable through stairs and elevators. These devices can be arranged in different order to make the most of small places or embed other equipment in those places. These boilers can efficiently provide the required heating load.

Engine room boiler controls contribute to the regular, efficient, and safe production of hot water or steam. Combustion and activity control adjusts the fuel consumption according to the required amount. The main executive control shows the hot water temperature or steam pressure and sends a signal to control the amount of combustion in which the amount of air and fuel enters the burner. The order of burning in the burner is generally on / off, high/low / off and gradual.