Interior and Perimeter Zones
The interior zone and perimeter zone are the zones used for indoor air conditioning. The interior zone is an area located in the center of a building that does not face exterior walls or windows. Because it is less susceptible to external influences, it is easier to maintain a stable room temperature. The perimeter zone is the area directly facing the exterior walls and windows of a building, and is greatly affected by outside temperatures, solar radiation, etc. This means that room temperature can vary greatly depending on the season and time of day.