Air Handling Units (AHUs) are essential components of heating, ventilation, and air conditioning HVAC systems. They are responsible for regulating and circulating air in buildings, ensuring a comfortable indoor environment. AHUs filter, heat, cool, and dehumidify the air before distributing it through ductwork to various spaces. Typically, an AHU consists of a fan, heating and cooling coils, filters, and dampers. These units can be customized to meet specific building requirements and can be used in both residential and commercial settings. Proper maintenance of AHUs is crucial for energy efficiency and indoor air quality.