A ceiling air diffuser is a channeled cover placed over an air conditioning distribution duct in the ceiling of a room. The channels or slots in the diffuser direct air to flow in specific directions, thereby allowing cool air to go exactly where it is needed. A variety of materials and shapes are used in different applications. Diffusers improve the efficiency of air conditioning and help to balance the temperature throughout a room. A reduction in the velocity of air movement yields more comfortable indoor spaces.
The most common ceiling air diffuser uses a pattern of concentric circles or squares. The openings between the slots force air more horizontally from the outer rings and gradually more vertically approaching the center. This balanced design sends cool air in all directions.
The structure of the slots can evenly distribute air or direct more of the flow to a particular area if that is required. Adjustable diffusers can be set for air patterns from horizontal to directly downwards. A radial diffuser pattern uses vanes similar to a windmill to direct the airflow.
The ceiling air diffuser can be constructed of steel, aluminum, or plastic. The shape can be square, rectangular, or round. Modified designs can be used with drop ceilings. The structure can fit flush to the ceiling or protrude downward, as may be the case in large industrial spaces with high ceilings. Well-designed diffusers maximize air distribution while minimizing noise level.
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