Answer :
Final answer:
Heat loss from a building primarily occurs through conduction, convection, and radiation. While evaporation and infiltration can contribute to heat loss, they are not the main mechanisms.
Explanation:
Heat is lost from a building in several ways, but the main mechanisms of heat transfer are conduction, convection, and radiation. Conduction occurs when heat moves through materials, such as when heat travels through a wall. Convection is the process of heat transfer through fluids (gases or liquids) as they move. For example, warm air rising and cool air descending within a room is an example of convection. Lastly, radiation refers to the transfer of heat in the form of electromagnetic waves, like the heat felt from the sun or a radiator. These three mechanisms may occur simultaneously in a building. Evaporation and infiltration are other considerations in heat loss, but they are not primary heat transfer mechanisms in the context of building heat loss.
