Moisture and water vapor moves in and out of a house primarily by what method?

Moisture and water vapor primarily move in and out of a house through a combination of diffusion and air currents. Diffusion refers to the process by which water vapor moves from areas of higher concentration to areas of lower concentration, occurring through materials such as walls, ceilings, and floors. This is a critical mechanism, especially in building assemblies where moisture control is needed to prevent damage or mold growth.

Air currents also play a significant role as they can transport moisture-laden air in and out of a home. Opening windows, using ventilation systems, or even natural infiltration can facilitate this movement. Together, these processes allow for the regulation of indoor humidity levels and contribute to the overall health and comfort of the living environment.

While other methods listed, like heating and cooling systems, can influence humidity levels indirectly, they are not the primary means of moisture movement. Similarly, condensation and sublimation are specific phases of moisture behavior rather than methods of movement, making them less relevant in this context.