(Optional) Prepare an HVAC plan.

Preparation should include setting the scale of the drawing, using the floor plan as an underlayment and

• creating the duct runs with registers, using a thick line weight and appropriate symbols
• drawing equipment to stand out clearly from the other elements of the floor plan
• labeling duct sizes according to established standards
• labeling equipment and all other components of the HVAC system. 

Process/Skill Questions:

• Why is it important to label the duct sizes, using the correct format?
• How is a floor supply register distinguished from a wall supply outlet?
• What are the advantages and disadvantages of using single-line vs. double-line in HVAC drawings?