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.

Extra air is introduced into the burner to ensure complete combustion. But too much will cause the air to overheat and leak out of the boiler, reducing boiler efficiency and creating security problems. When the boiler is set, its purpose is to maximize combustion efficiency by providing extra air precisely and sufficiently for complete combustion, but not too much to reduce efficiency. How much extra air is needed to burn completely This rate varies in different designs and conditions of boiler and burner and different amounts of burner ignition but is usually between -%. Excess air must also adapt to fluctuations in temperature, density, and humidity of the boiler combustion air during the day and season. It is desirable to keep the amount of excess air constant throughout the ignition range.

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.

Cast iron boilers that are cross-sectionally cast iron are another type of engine room boiler that is used to heat commercial premises. These boilers do not use pipes, but instead, have cast-iron sections with water and combustion gas corridors. The cast iron parts are screwed together and look like a steam radiator. These parts are connected to each other by fireproof washers. These boilers are used to produce steam or hot water and are available in sizes from , to , BTU.

The pressure difference between the combustion chamber of the boiler and the ventilator (also called the exhaust chimney) creates a suction that carries the products of combustion along with the boiler and directs it to the chimney. The natural suction of boilers depends on the natural buoyancy of hot gases to remove combustion products through the aerator and direct fresh air into the combustion chamber. Mechanical suction of engine room boilers includes compressed air, where the air is forced into the combustion chamber by a fan or blower to maintain positive pressure. Induction suction, where the air is drawn through the combustion chamber by a fan or blower to maintain negative pressure.