What is the 'stack effect' in relation to heating in a house?

The 'stack effect' refers to the phenomenon where heated air rises within a structure, particularly in taller buildings. As air is warmed, it becomes less dense and rises, creating a flow of air that can influence overall indoor temperature and ventilation. This effect is crucial in understanding how heat distribution works in a home.

In essence, when air is heated, it expands and rises, leading to a low-pressure area near the bottom of the structure that pulls in cooler air from outside to replace it. This can create a natural circulation throughout the house, where heated air moves upward and cooler air is drawn in from below, improving the heating efficiency.

Understanding the stack effect is important for effectively managing indoor temperatures and ensuring that heating systems operate efficiently without creating unwanted drafts or temperature fluctuations. It is particularly significant in multi-story homes or buildings where the vertical space can amplify this effect.