In HVAC terminology, what does the term 'infiltration' refer to specifically?

In HVAC terminology, 'infiltration' specifically refers to uncontrolled air leakage into a building from the outside environment. This phenomenon can occur through various openings such as cracks, seams, or other unsealed areas in a building's structure. Infiltration is significant because it can affect indoor air quality, energy efficiency, and overall comfort levels.

This uncontrollable air exchange can cause drafts, unwanted humidity changes, and increased energy costs as heating and cooling systems work harder to maintain the desired indoor environment. Understanding infiltration is crucial for HVAC professionals as it informs strategies for sealing leaks and improving the insulation of buildings, thereby enhancing comfort and reducing energy waste.