To ensure proper installation and to prevent costly mistakes, it is important to do a lot of advanced planning.
Part of that advanced planning is the creation of a schematic with the duct detailing to help contractors figure out exactly where to place ducts and equipment.
When building a new construction or doing a massive renovation on an older structure, there are often many different types of contractors involved: builders, plumbers, electricians and HVAC technicians.
Renderings that give contractors the details of where each system will be laid, allows each type of contractor to make sure their systems do not cross or get in the way of one another.
The customer is always right, or so the saying goes.
Having a plan of the duct detailing to show the client can allow him to see where things like the furnace and air vents will be placed.