This heat load will have to be absorbed and conveyed to the exterior by the building’s cooling system. This includes external heat sources such as solar radiation, and internal heat sources such as people, lighting, kitchens, computers and other equipment, and so on.įor example, a data centre housing computers and servers will produce a certain heat load that derives from an electrical load. This must take account of all potential heat-producing activities ( heat sources).
The term heat load can also refer to the capacity required from a cooling system to maintain the temperature in a building or space below a required level. In Passive houses, this is around 10W/m2 which is roughly 10% of the energy used in conventional buildings. In contrast, in a building with a very high level of thermal efficiency, the heating demand can be practically negligible. In poorly insulated, poorly sealed buildings, the heat load will be greater than in thermally efficient buildings. It can be used to refer to the quantity of heat per unit of time (usually over an hour) that is required to heat a given space in order to maintain it at a given temperature. The use of passive design can reduce the heat load for a building. This can be determined in relation either to the required heating or the required cooling.
Heat load (or heating load) in relation to building physics refers to the amount of heating or cooling necessary to maintain the required temperature in a building or space within that building. 5 Related articles on Designing Buildings.
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