What is indicated by the term "Circulating Air" in HVAC systems?

The term "Circulating Air" in HVAC systems refers to air that is recirculated in living areas. This air is part of the heating, ventilation, and air conditioning process that maintains comfortable temperatures and air quality inside a building. The circulation of air helps to ensure that it is evenly distributed throughout the space, thus preventing hot or cold spots, and plays a key role in effectively conditioning the interior environment.

This process can involve mixing some outdoor air with the recirculated air to improve ventilation and remove contaminants, but fundamentally, the emphasis is on the movement and recirculation of air within the inhabited areas of a building. By using circulating air, HVAC systems are able to provide more efficient temperature control and maintain indoor air quality.