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HVAC Air Handling Unit Design Considerations

A. Bhatia, B.E.

A properly designed HVAC system performs three basic functions: 1) Controls temperature and humidity to provide thermal comfort, 2) Distributes adequate amounts of outdoor air to meet ventilation needs and 3) Isolates and removes odors and pollutants through pressure control, filtration, and exhaust fans. An air handling unit often abbreviated as AHU is a very important component of central-air-conditioning system, that is responsible for drawing return air from the indoor spaces, mixing it with outdoor air and processing that air to the appropriate conditions to be supplied to the building spaces.

This 4-hr course outlines the primary functions of various sub-items of air handling units and discusses the key design considerations for estimating the capacity and airflow rate.

The course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of the course materials.

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