A Fresh Air Handling Unit (AHU) is a system used in heating, ventilation, and air conditioning (HVAC) to provide conditioned air to a building. Its primary function is to take in outside air, filter it, heat or cool it as necessary, and then distribute it throughout a building. The purpose of a Fresh Air Handling Unit is to maintain indoor air quality by introducing a controlled amount of fresh air while also regulating temperature and humidity.

The main components of a Fresh Air Handling Unit typically include:

Intake Dampers: These control the amount of outside air entering the unit.

Filters: Air filters are used to remove particles and contaminants from the incoming air.

Heating or Cooling Coils: Depending on the climate and the need for temperature control, these coils heat or cool the air.

Humidifiers/Dehumidifiers: These components help control the humidity levels of the air.

Thermal Wheel: This is where the outside air and return air are mixed to achieve the desired temperature and humidity.

Fan: The fan circulates the air through the unit.

Supply Ducts: Once the air is conditioned, it is distributed through ductwork to various parts of the building.

Exhaust Dampers: These control the release of stale air from the building.

Fresh Air Handling Units are crucial for maintaining a healthy indoor environment by ensuring a continuous supply of fresh air and regulating temperature and humidity levels. They are commonly used in commercial buildings, industrial facilities, and other spaces where precise control over the indoor environment is necessary.

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