What are day/night zones?

A common ducted system setup is one that has two areas specified as day and night zones. A "Day Zone" focuses on conditioning areas of your home that are occupied during the day (such as the living rooms) and a "Night Zone" on areas that are occupied more at night (such as bedrooms).

This two-zone setup ensures energy is not wasted by cooling or heating rooms that are not in use, and allows for more cost effective air conditioning of your home via a smaller capacity unit.