How much can boiler efficiency increase by using an air heater?

In the context of boiler efficiency, an air heater can significantly enhance performance by preheating the combustion air that is supplied to the boiler. By raising the temperature of the incoming air, it effectively reduces the energy required to bring the air to the combustion temperature. This means that more of the heat generated during the combustion process is available for useful work rather than being lost through the exhaust gases.

The range of 5-10% improvement in efficiency is a realistic expectation based on industry practices and empirical data. This increase can lead to improved overall system performance, reduced fuel consumption, and lower greenhouse gas emissions, making air heaters a beneficial addition in many boiler systems.

Opting for an air heater not only enhances boiler efficiency but also contributes to cost savings in fuel expenses. Thus, the improvement in efficiency through the use of an air heater is significant enough to be categorized within this range, which aligns well with standard performance metrics observed in various heating applications.