The following key terms were used in this lesson:
In a structure, this is the space that exists in the middle of the actual ceiling and the dropped ceiling, which is frequently made use of as an air duct for heating and cooling purposes. This space also consists of electric, telephone, and network cables and wires.
A device located in an opening provided at the boundaries of the treated space to ensure a predetermined motion of air in this space. These can include supply and return diffusers.
Variable Air Volume
A technique for controlling the capacity of a heating, ventilating, or air-conditioning (HVAC) system. The simplest VAV system incorporates one supply duct that, when in cooling mode, distributes cool supply air. Because the supply air temperature is constant, the air flow rate must vary to meet the rising and falling heat gains or losses within the thermal zone served.