When you start drawing duct or pipe in Revit MEP with the Out Of The Box (OOTB) project template, you may see some color overrides automatically applied. Where do these come from? And more importantly, how can we customize them to our own standards? Let’s start with the “Duct” tool. Before we even place our first point, let’s look at the “Properties” palette and notice the parameter there, under the “Mechanical” heading, called “System Type”.
This parameter allows us to designate the type of system our duct is without needing to connect to equipment or air devices (as was required in the past). You will notice that for the OOTB project template, duct system overrides have been set up for each of the available system types (Supply, Return, Exhaust). Please note, you can add additional system types as needed. These defaults are meant only to demonstrate possibilities.
These overrides are stored as “Type Properties” of the “System Type”. The only way to access these properties is by placing an element in that system (you have to model something first). After placing the duct in the model, select it. You should see a new tab appear in the ribbon called “Duct Systems”.
Switch to that tab and notice the “Properties Palette” updates to show the properties of the duct system rather than the duct itself. Click on the “Edit Type” button to access the “Type Properties” of the duct system. From here you will see the top line is where these “Graphic Overrides” are controlled. Pick that “Edit” button to change the line “Weight”, “Color”, and “Pattern” as you like.
From the “Type Properties” of the system you can also “Duplicate” the system type to create various types each with unique graphic overrides as needed. You can also assign the “Rise/ Drop” symbol to be used with the system.
It should be noted that procedures for pipe systems are analogous to the duct procedures shown here.
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