The definition of an air flow channel is a passage or conduit through which air can move. It is a pathway for air to travel, usually created by an enclosure or barrier. Air flow channels can be used to direct air to specific areas, to control the temperature of a room, or to create a comfortable environment. They can also be used to reduce noise, to improve air quality, and to increase energy efficiency. Air flow channels are often used in ventilation systems, HVAC systems, and air conditioning systems. They are also used in industrial applications, such as manufacturing and construction. Air flow channels can be made from a variety of materials, including metal, plastic, and fiberglass. The size and shape of the air flow channel will depend on the application and the desired air flow rate.