The Part Type parameter provides additional subclassification of a family category, and determines the behavior for the parts in the family. The part type serves 2 functions:
- To only allow replacing a particular part with a similar part in a building project. Generally the Type Selector allows you to replace a family of one category with any other family of the same category. However, there are times when this is not appropriate. For example, for fittings it would not be valid to replace a cross with a transition. So there is a level of filtering built into the Type Selector for Revit.
- To determine the part type family. The ASHRAE Duct Fitting Database, Version 5.00.00 is integrated with Revit. This allows calculating fitting losses based on a loss table. To accurately look up the correct fitting in the database, the part type must be defined.
If a family category provides a Part Type parameter, the Part Type values available depend on the family category. The following table shows which part types apply to which family categories:
| Family Categories | Part Types |
|---|---|
| Air Terminals | Cross, Cross-Reducing, Damper, Duct Mounted Equipment, Elbow, Elbow-Reducing, Entry, Exit, Equipment, Fan and System Interaction, Hood, Junction, Obstruction, Tee, Tee-Reducing, Transition, Undefined, Valve |
| Duct Accessories | |
| Duct Fittings | |
| Mechanical Equipment | |
| Pipe Accessories | |
| Pipe Fittings | |
| Plumbing Fixture | |
| Communication Devices | Normal, Panelboard, Transformer, Switchboard, Data Panel, Switch Junction Box |
| Data Devices | |
| Electrical Equipment | |
| Electrical Fixtures | |
| Fire Alarm Devices | |
| Lighting Devices | |
| Lighting Fixtures | |
| Nurse Call Devices | |
| Security Devices | |
| Telephone Devices | |
| Cable Tray Fitting | Channel Elbow, Channel Vertical Elbow, Channel Cross, Channel Tee, Channel Transition, Channel Union, Channel, Offset, Channel Multi Port, Ladder Elbow, Ladder Vertical Elbow, Ladder Cross, Ladder Tee, Ladder Transition, Ladder Union, Ladder Offset, Ladder Multi Port |
| Conduit Fittings | Elbow, Cap, Union, Multi Port, Tee, Cross, Junction Box Elbow |
- Damper: Used to control flow volume.
- Duct Mounted Equipment: Smoke detectors, steam generators
- Elbow: A bend or elbow type fitting
- Entry: Point at which fluid enters the system: louvers, grills, grates
- Exit: Point at which fluid leaves the system
- Equipment: Generic equipment
- Fan and System Interaction AHUs, inline fans
- Hood: Kitchen, lab or other exhaust hoods
- Junction: Intersection of 3 or more segments (tee, cross, wye)
- Obstruction: Anything that causes a pressure drop, such as an inline filter
- Transition: Shape or size change
- Undefined: No specific functionality
- Valve: Valves and similar accessories
- Data Panel: Panels used to connect devices with connectors of System Type Data, Telephone, Security, Fire Alarm, Nurse Call, Controls, and Communication.
- Normal: Devices such as receptacles, fire alarm components, and light fixtures.
- Panelboard: Used to connect devices/equipment with connectors with a System Type value of Power and to generate branch circuit type schedules.
- Switch: Control device such as a switch where wiring is typically not drawn through the devices. As indicated in the image, the automatically generated wiring branches to the switch.
- Junction Box: Wire management devices through which wiring is generally drawn through the device. As indicated in the image, the automatically generated wiring branches through the junction box.
- Switchboard: Used to connect devices/equipment with connectors with a System Type value of Power and to generate branch circuit type schedules.
- Transformer: Used to interconnect Panelboards and/or Switchboards of differing voltages.