The selection of air handling equipment and ductwork depends on various factors, including system capacity, airflow requirements, and space constraints. The Air Distributer chapter of the Carrier System Design Manual provides guidance on practical design and layout of air handling equipment, ductwork, and air distribution components. Engineers should consider factors such as fan power, duct size and material, and diffuser selection to ensure efficient and effective air distribution. Additionally, engineers should consult industry standards, such as ASHRAE guidelines, to ensure compliance with relevant codes and regulations.