How can draw HVAC duct?

To draw HVAC ductwork, start by determining the layout of your duct system, including the main ducts, branches, and vents. Use a CAD software or graph paper to create a scaled plan, marking the dimensions and positions of each duct section. Draw straight lines for the main ducts and use appropriate symbols for fittings like elbows and transitions. Finally, label each section for clarity, ensuring that the airflow direction is indicated.