Graphics Programs Reference
In-Depth Information
energy-analysis application. There are several things you will need to verify to make sure your
rooms and room volumes are properly configured:
Ensure that all spaces have a room element. Each area within the model that will be
affected by the mechanical system will need to have a room element added to it. To add
rooms, select the Room tool from the Architecture tab.
Set room heights. Once all the rooms are placed, each room's properties should be
redefined to reflect its height. The height of the room should extend to the bottom of the room
above (in a multistory building), or if it is the top floor or only floor of a building, the room
must fully extend through the roof plane. When you extend the room through the roof plane,
the software will use the Roof geometry to limit the height of the room element and conform
it to the bottom of the roof. Rooms should never overlap either in plan (horizontally) or
vertically (between floors) because this will give you inaccurate results.
An easy way to set the room heights is to open each level and select everything. Using the
Filter tool (Figure 9.45), you can deselect all the elements and choose to keep only the rooms
selected. In this way, you can edit all the rooms on a given floor at one time.
Figure 9.45
use the Filter tool
to select only the
rooms.
Once the rooms are selected, go to the Properties palette and modify the room heights. By
default, rooms are inserted at 8'-0” high, and the default for metric projects is 4 m. You have
the option to set a room height directly, or you can modify the room height settings to go
to the bottom of the floor above. This second option is shown in Figure 9.46. Note that you'll
need to set Upper Limit to the floor above and set the Limit Offset value to 0 (zero). Repeat
this same workflow for every floor of the building.
Turn on room volumes. Now that all the heights are defined, you have to tell the application
to calculate the volumes of the spaces. By default, Revit does not perform this calculation.
Depending on the size of your file, leaving this setting on can hinder performance. Make sure
that after you export to gbXML, you return to the Area And Volume Computations dialog box
from the Room & Area panel on the Home tab and change the setting back to Areas Only.
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