What should be provided when exhaust air exceeds intake air?

When exhaust air exceeds intake air, the system requires make-up air to ensure a proper balance of air within the environment. Make-up air is essential because it compensates for the loss of air that occurs when exhaust is vented outside. This process prevents negative pressure in a space, which can lead to issues such as drafts, increased energy costs, and potential infiltration of unfiltered outside air, which can affect air quality and comfort.

Providing make-up air ensures that there is enough air available to replace what has been lost through exhaust, maintaining the right environment for ventilation and air quality. It is critical in both residential and commercial systems for maintaining proper pressure and ensuring adequate ventilation according to building codes and standards. Other air types, such as fresh air supply or recirculated air, may improve indoor air quality or comfort, but they do not specifically address the need to balance the air exchange created by an excess of exhaust compared to intake.