Indoor air handling units (AHUs) are essential components of HVAC systems, designed to manage and distribute conditioned air throughout interior spaces. These units work by regulating the temperature, humidity, and air quality, ensuring a comfortable and healthy environment. AHUs typically integrate with ductwork to circulate air, using filters to remove contaminants and heating or cooling coils to adjust the air's temperature. They can also incorporate energy recovery systems to improve efficiency, reducing energy costs while maintaining fresh airflow. Indoor AHUs are commonly used in commercial buildings, hospitals, schools, and other large facilities, where precise climate control is essential.