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what is the main function of ahu?

The main function of an Air Handling Unit (AHU) is to condition and circulate air as part of a heating, ventilation, and air conditioning (HVAC) system. It ensures a controlled indoor environment by managing the air's temperature, humidity, cleanliness, and ventilation levels.

Key Functions of an AHU:

  1. Air Circulation:
    • Moves air through the HVAC system to provide a continuous flow of fresh or conditioned air throughout a building.
  2. Air Filtration:
    • Removes dust, allergens, and other contaminants using filters to improve indoor air quality.
  3. Heating and Cooling:
    • Contains heating coils (electric, hot water, or steam) and cooling coils (chilled water or refrigerant-based) to adjust the air temperature.
  4. Humidity Control:
    • Adds or removes moisture from the air to maintain a comfortable and healthy humidity level.
  5. Mixing Air:
    • Mixes fresh outdoor air with recirculated indoor air to maintain ventilation and save energy.
  6. Ventilation:
    • Supplies fresh air to dilute indoor pollutants and meet ventilation requirements for occupant health.
  7. Energy Efficiency:
    • Often incorporates energy recovery devices, such as heat exchangers or enthalpy wheels, to reduce energy consumption by recovering energy from exhaust air.

Typical Applications:

  • Office buildings
  • Hospitals
  • Manufacturing plants
  • Schools
  • Shopping malls
  • Large residential complexes

The AHU plays a critical role in maintaining thermal comfort and indoor air quality, making it an essential component in modern HVAC systems.

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