A good example of this is a two-story house in the summertime. The upstairs is almost invariably warmer than the downstairs. To cool off the upstairs, the thermostat can be turned down, but by the time a comfortable temperature is reached upstairs, the occupants who are downstairs are usually freezing. This scenario can result in higher energy costs and frustrated, uncomfortable homeowners.
The solution to this problem is to install a zoning system, which divides a home into sections so the temperature can be controlled more accurately. A properly installed zoning system will ensure that the correct amount of airflow is delivered to each zone, so that occupants in every part of the house are comfortable at all times. There are several methods by which airflow can be managed, and it is up to the contractor to decide which technique should be used, depending on the application in question.