Creating custom units in Project

[Andrej.Licanin]

Is there a way to add custom units to custom Project parameters?

For example, I want to add a field "Air required per person" with a unit "m3 /h /Person" to Rooms.

I can only find the ones that are already inside Revit like Length, Volume, Area.

[hmunsell · Accepted solution]

you can do a Calculated Parameter, but you need parameters to created it with. 

you can add custom parameters as needed for your formula (try to use Default parameters as much as possible). then create a Calculated Parameter to add to your schedule. if you don't want to see the parameters in the schedule that were used to create the Calculated Parameter, you can select them in the formatting tab and Hide them.

[ToanDN]

Add a Calculated Value parameter to your schedule to divide the Space Air Volume to the Occupants and you get Air Volume per Person:

Air Volume parameter: Unit = L/s
Occupants parameter: Number

formula: (Air Volume / 1000) / (1/3600) / Occupants

That will get you m3 per hour per person