This increases comfort in winter while improving indoor air quality. Air movement in summer reduces the need for air conditioning. In this climate comfort can be provided at a much lower cost through evaporative cooling that uses humidity to provide a cooling effect. It is the sensation of getting out of a pool on a hot summer day and feeling chilled for a moment until the water evaporates off the body. A ceiling fan uses airflow to provide comfort.
Air movement creates a cooling breeze.
A whole house fan can have the same effect for the entire house if it is installed and operated correctly. In the winter the whole house fan must be sealed and insulated or it will lose heat like a hole in the ceiling.