HVAC drawing standards ensure consistency, accuracy, and clarity in mechanical design documentation. These standards define how heating, ventilation, and air conditioning systems are represented in architectural and engineering drawings. Common practices include the use of standardized symbols, line types, annotations, and layouts. Drawings typically include ductwork, piping, equipment locations, airflow direction, and system zoning. Adherence to standards such as ASHRAE, SMACNA, and local building codes is essential. These drawings are crucial for coordination among disciplines, installation, inspection, and maintenance. Proper HVAC drawings help reduce errors, improve efficiency, and ensure compliance with safety and performance requirements throughout the project lifecycle.