Understanding the Key Components of an AHU (Air Handling Unit)

An Air Handling Unit (AHU) is a crucial part of any HVAC system that is responsible for regulating the temperature, humidity, and air quality within a building. It’s essentially a large metal box that contains several key components that work together to maintain a comfortable and healthy indoor environment. In this article, we’ll take a closer look at the key components of an AHU and their functions.

Filters:

Filters are the first line of defense in an AHU. They are responsible for removing dust, dirt, and other particulate matter from the incoming air. This is important because it not only helps to maintain air quality, but it also prevents debris from clogging up the other components within the AHU.

Heating/Cooling Coils:

Heating and cooling coils are responsible for regulating the temperature of the air passing through the AHU. These coils can be heated by a variety of sources, including electric, hot water, and steam, and they can also be cooled by chilled water or refrigerant. By controlling the temperature of the air passing through the AHU, the heating and cooling coils help to maintain a comfortable indoor environment.

Humidifier/Dehumidifier:

Humidity is another important factor to consider when it comes to indoor air quality. If the air is too dry, it can lead to discomfort, dry skin, and respiratory issues. If the air is too humid, it can lead to the growth of mold and bacteria. Humidifiers and dehumidifiers work to regulate the humidity levels within the AHU by adding or removing moisture from the air as needed.

Fans:

Fans are responsible for moving the air through the AHU and into the ductwork that distributes it throughout the building. Without fans, the AHU would not be able to perform its function effectively.

Dampers:

Dampers are used to regulate the flow of air within the AHU. By adjusting the position of the dampers, it’s possible to control the amount of air that is allowed to pass through each section of the AHU. This is important because it helps to ensure that the air is distributed evenly throughout the building.

Controls:

Controls are the brain of the AHU. They are responsible for monitoring the temperature, humidity, and air quality within the building and adjusting the various AHU components as needed to maintain a comfortable and healthy indoor environment. The controls can be programmed to operate automatically based on pre-set parameters, or they can be manually adjusted as needed.

In conclusion, understanding the key components of an AHU is essential to maintaining a comfortable and healthy indoor environment. By ensuring that each component is functioning properly and working together effectively, building owners and managers can provide a safe and pleasant environment for their occupants. If you’re in the market for an AHU, be sure to work with a reputable supplier who can help you select the right components for your specific needs.