Air conditioners, in their basic function, circulate and cool the air within a closed space. However, modern systems often incorporate a mechanism for introducing fresh air from the external environment. This process allows for the replenishment of oxygen and the dilution of stale indoor air, which may contain pollutants like carbon dioxide, volatile organic compounds (VOCs), and other airborne contaminants. The inclusion of exterior air intake ensures a healthier and more comfortable environment for occupants.
The introduction of fresh air is essential for maintaining indoor air quality. Without it, the concentration of indoor pollutants can increase significantly, potentially leading to health problems such as headaches, fatigue, and respiratory issues. Moreover, adequate ventilation helps control humidity levels, preventing the growth of mold and mildew. Historically, buildings relied on natural ventilation through windows and doors. As buildings became more airtight for energy efficiency, mechanical ventilation systems became necessary to achieve adequate air exchange.
