Graphics Programs Reference
In-Depth Information
Flow direction is also important to enable systems to function correctly. The
Flow Direction parameter for the connector of a supply air diffuser should
be set to In (as the air is flowing from the system into the connector), and as
such the parent for that system needs to have Flow Direction set to Out. If
these are not set this way, the system cannot calculate the airflows because
there is not a definite direction of flow along the duct.
Using System Filters
Mechanical engineering documents describe complex systems and design
intentions. It is easy to overwhelm the person trying to understand those
intentions. Revit filters offer us additional control over the visibility of
certain elements in views as well as the appearance those elements will
have (if you chose filters to control color and linetype). Without filters, we
wouldn't be able to create sheets for the various subdisciplines—separating
medical gas systems from plumbing and mechanical, for example. Filters
help us create high-quality documentation as well as provide a better way to
examine our design and improve the coordination of our projects.
To set up system filters, you can open any model view (plan, ceiling,
elevation, section, and 3D are model views; nonmodel views are drafting
views and legends) and type
VG
to access the Visibility/Graphic Overrides
dialog box. Next, select theFilters tab and click Edit/Newtoopen theFilters
dialog box, shown in
Figure 9.25
. Notice that in this dialog box several filter
names are in Revit by default. Remember that any changes made to filters
after clicking Edit/New are global changes to the entire project, so adjusting
filters should be left to the more experienced Revit users.
