Ventilation gas savings provide the best heat recovery opportunity. In boiler chimneys, there is a need for heat exchangers to transfer heat from the flue gas to the return water or to feed the boiler or combustion air. They even work well in boilers and operate at relatively low flue gas temperatures. There is a large room to recover some of the flue gas heat, which rises if the flue is not recovered. Saving gas from the chimney usually increases the overall efficiency of the boiler by to percent.

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.

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.

The hot water produced by the boiler is pumped through pipes and reaches the building equipment, which can include hot water coils in the fan coils, hot water heating equipment and heating systems. Boilers produce steam that flows from high-pressure to low-pressure areas through pipes without the need for an external energy source, such as a pump. The steam used for heating can be used directly for steam-powered equipment, or through a heat exchanger can generate heat to produce hot water for the equipment.

Natural gas boilers use one of two types of burners, atmospheric burner (natural suction) and compressed air burner (forced air) or electric burner. Nox burners (the type of nitrogen oxides most associated with air pollution) and pre-mix burners (burners where air and gas are mixed before the fan) are commonly used to reduce air loss and stabilize air quality. And even required in some areas. To ensure the usefulness of mixing the air and fuel entering the burner, these types of burners can reduce NOx leakage.