What does the term "infiltration" in the context of heating systems refer to?

The term "infiltration" in the context of heating systems specifically refers to the unintended air leakage into the system. This can occur in various parts of a building, including around windows, doors, and other openings where air might enter the conditioned space from outside. When infiltration occurs, it can lead to increased heating demands on the system, requiring more energy to maintain the desired indoor temperature.

Understanding infiltration is essential for optimizing the efficiency of heating systems. Proper sealing and insulation can minimize these air leaks, ultimately reducing energy costs and improving comfort levels in a building. This highlights the importance of controlling air flow to ensure heating systems operate effectively and efficiently.