What is meant by “load” in terms of a boiler system?

In the context of a boiler system, "load" refers to the amount of steam or hot water that is required by the system to meet the needs of the heating demand. This encompasses the energy output the boiler must deliver to fulfill the heating needs of a building or process. Essentially, understanding the load is critical for proper boiler sizing, as it ensures that the boiler can generate sufficient steam or hot water to maintain desired temperatures and comfort levels in the connected system. A well-calibrated boiler load helps optimize efficiency and performance.

The physical weight of the boiler itself is not associated with its operational capacity or needs. The pressure within the boiler pertains to the internal conditions of the system rather than the output demand. Similarly, the temperature of the water is a parameter that can influence heat transfer and system performance, but it does not define the load. Therefore, the understanding of "load" in the context of a boiler system is specifically about the output requirements necessary for the effective operation of heating applications.