Autodesk Revit Naming
Requirements
©
USC Nomenclature Guide for the correct naming of
Families, Types, Instances, Systems and Zones
Nomenclature | 2
SOURCES
OmniClass Table 23 Products
OmniClass Table 21
Elements (Assemblies)
Legacy Source
MasterFormat ©2004
Legacy Source
UniFormat™ 1992,1998
U.S. National CAD Standards
Module 05
Terms and Abbreviations
Nomenclature | 3
OMNICLASS
• Classification system for the construction industry
• Developed via consensus and broad participation from the
construction industry, individuals and organizations
• Uses existing legacy systems like MasterFormat ©2004 and
UniFormat™ 1992,1998
• 15 Tables covering everything from facilities to spaces, construction
products, assemblies, phases, organizational roles, tools, disciplines
etc.
Nomenclature | 4
U.S. NATIONAL CAD STANDARDS
Module 05 Terms and Abbreviations
Nomenclature | 6
example
FAMILY, TYPE & INSTANCE NAMES for VAV BOX
D01
Nomenclature | 7
FAMILY, TYPE & INSTANCE
Family Name
Type Name
Instance Name
Variable Air Volume
Terminal Units
VAV Reheat 6”
VAV-D01
Type Description
Instance Description
VAV with Reheat Price
SDV 6”
VAV Box with Reheat
6” D01
Nomenclature | 8
FAMILY NAME
Variable Air Volume Terminal Units
OmniClass Table 23
23-33 41 17 13
23-33 41
23- 33 41 17
23-33 41 17 13
HVAC Air Terminals
Terminal Air Units
Variable Air Volume
Terminal Air Units
Add a further description here as
a suffix as needed at your
discretion if you need to
differentiate between one family
and another that are close in
geometry or function. As long as
the official OmniClass Table 23
name appears at the beginning,
what you add after is acceptable
if this extra description is
necessary.
Nomenclature | 9
FAMILY NAME
Variable Air Volume Terminal Units
OmniClass Table 23
23-33Air41
17 13
23-33 41 17 13 Variable
Volume
Terminal Units
Nomenclature | 10
TYPE NAME
VAV Reheat 6”
U.S. National CAD Standards
“VAV”
1
+
Brief description denoting size /
capacity/type as easily identified
& understood
(description is based on your discretion but should at
minimum include sizes or dimensions for example
2’x 2’, 6”, 8” 1.5’ x 3’, 10” etc.)
+
1
“Reheat 6” ”
If the abbreviation for a piece of equipment is not listed in the National CAD
Standards, use the abbreviation used in your equipment/component schedules
instead. For example, a “Fan Powered Box” would be abbreviated as “FPB”,
Use abbreviations as universally understood in the industry
Nomenclature | 11
TYPE DESCRIPTION
2
VAV with Reheat Price SDV 6”
Type Name
“VAV”
2
+
Extended description denoting
manufacturer/model/size / type
as easily identified & understood
+
“with Reheat
Price SDV 6” ”
Populating this parameter, “Type Description” is a requirement. Filling in the fields, however, is up to your discretion.
You may enter an added description here to supplement Type Names for the purpose of clarity or leave it blank.
Nomenclature | 12
INSTANCE NAME
VAV-D01
U.S. National CAD Standards
“VAV”
3
ID unique to that component
as identified in the equipment / component
schedules
For example, Tag Number “D01”
“D01”
3 If the abbreviation for a piece of equipment is not listed in the National CAD
Standards, use the abbreviation used in your equipment/component schedules
instead. For example, a “Fan Powered Box” would be abbreviated as “FPB”,
Use abbreviations as universally understood in the industry
Nomenclature | 13
INSTANCE DESCRIPTION
4
VAV Box Reheat 6 Inches D01
U.S. National CAD Standards
“VAV”
Extended annotative description
denoting type/size/id/location
unique to that component
“Reheat 6 Inches
+
D01”
4
Populating this parameter, “Instance Description” is a requirement. Filling in the
fields, however, is up to your discretion. You may enter an added description here
to supplement Instance Names for the purpose of clarity or leave it blank.
Nomenclature | 14
HOW TO RENAME FAMILIES TYPES
Family Name
Variable Air Volume Terminal Units
Directly in the
Project Browser
or
Directly in the
.rfa Family File
INSTANCES
Nomenclature | 15
HOW TO RENAME FAMILIES TYPES
Type Name
VAV Reheat 6 Inches
Directly in Revit or the
Revit Family file
or
Allows for the maintenance of
your original office standards while
simultaneously meeting USC’s
requirements
Type Description
VAV with Reheat Price SDV 6
Inches
Shared Parameter
“Type Name”
Shared Parameter
“Type Description”
INSTANCES
Nomenclature | 16
HOW TO RENAME FAMILIES, TYPES, INSTANCES
Instance Name
VAV-D01
Shared Parameter
“Instance Name”
Instance Description
VAV Reheat 6 Inches D01
Shared Parameter
“Instance Description”
Nomenclature | 17
TYPE & INSTANCE NOMENCLATURE EXECUTION OVERVIEW
SYSTEM & SHARED PARAMETERS
Major Equipment/Element TYPES
Parameter Name
Revit Type Name
(directly in Revit)
or
Type Name
and
Type Description
Major Equipment/Element INSTANCES
Parameter Name
<Insert USC Type Nomenclature Here>
Instance Name
<Insert USC Instance Nomenclature Here>
and
<Insert USC Type Nomenclature Here>
<Insert USC Type Nomenclature Here>
Instance Description
<Insert USC Instance Nomenclature Here>
Nomenclature | 19
SYSTEMS
Mechanical Supply Air AHU-D1
OmniClass Table 21
21-04 30 60 10
Abbreviation : U.S.
National CAD Standards
HVAC – Ventilation – Supply
Air
Air Handling Unit
Identification
that further
defines a piece
of equipment
from others
(usually a tag
number or mark
from the schedules)
“Supply Air” +
“AHU”
+ “D1”
Nomenclature | 20
DUCTLESS SYSTEMS
Mechanical Return Air RG-1 2nd Floor 214A Office
Ductless return air system consisting of pieces of ductwork and a return air grille marked as “RG-1”, whose grille is
physically located in room 214A Office on the 2nd Floor
OmniClass Table 21
21-04 30 60 20
HVAC – Ventilation – Return Air
Tag number of the
Return Grill “RG-1”
Floor + USC Official Room
Name & Number
RG-1
Room :
214A Office
“Return Air” +
“RG-1” +
“2nd Floor
214A Office”
Nomenclature | 21
ZONES
VAV-D01 Offices 100, 101, 102
example: HVAC Zone associated with VAV Box D01 serving Offices 100,101,102
National CAD Standard
NCS 3.1 Module 5
abbreviation for Air
Handling Unit is "VAV"
USC Official Room Names
and Numbers for Rooms
contained in that Zone
+
Description denoting
‘size/type as easily
identified "D01"
VAV-D01
Office "100", "101", "102"
Office 100, 101, 102
ZONE NAME
VAV-D01 Offices
100, 101, 102