What is an air handler?

An air handler, often referred to as an AHU (Air Handling Unit), is a central station air conditioner designed to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system.

Here's a breakdown of key aspects:

• Function: Its primary function is to take in outside air, condition it, and supply it as fresh air to a building. It can also recirculate some of the air within the building.
• Components: Typical components of an air handler include:
  • Blower/Fan: A https://www.wikiwhat.page/kavramlar/Blower%20Fan is responsible for circulating the air.
  • Heating and/or Cooling Elements: These can be coils carrying hot water, steam, or refrigerant (for cooling). Electric resistance heaters are also used.
  • Filters: https://www.wikiwhat.page/kavramlar/Air%20Filters remove dust, pollen, and other particulate matter from the air.
  • Dampers: These control the amount of outside air, recirculated air, and exhaust air.
  • Mixing Chamber: Where outside air and recirculated air are mixed.
  • Humidifier/Dehumidifier: These devices add or remove moisture from the air. (Optional)
  • Sound Attenuators: Reduces noise generated by the unit. (Optional)
• Types: Air handlers can be categorized by their configuration (horizontal or vertical), size (capacity), and application (residential, commercial, or industrial).
• Placement: Air handlers are typically located in mechanical rooms, basements, or on rooftops.
• Maintenance: Regular https://www.wikiwhat.page/kavramlar/HVAC%20Maintenance is crucial for optimal performance, including filter replacement, coil cleaning, and fan motor maintenance.
• Controls: Air handlers are controlled by a thermostat or building management system (BMS) to maintain desired temperature and humidity levels.
• Energy Efficiency: Modern air handlers often incorporate energy-saving features such as variable-speed fans and high-efficiency filters.