There seem to be a lot of people asking for different units or “Types of Parameters” (data types). But the requests and support are spread thin because people are only asking for a particular unit (see links below). I have a few ideas that are related that I think could help.
Let us “build” new “Type of Parameters” that don’t already exist. For example, someone may want to add mass flow rate since it’s an industry standard for many Revit users. Let them “build” a new unit using fundamental units (https://en.wikiversity.org/wiki/Fundamental_units)
Let us add Units to existing “Type of Parameters”. Continuing with the example above, someone might want to add pounds per hour. I imagine that they would need to provide a symbol and a conversion factor to the fundamental units.
Let us add Unit symbols to existing units. Someone might want to report a Length parameter in “FT” (all caps), but currently they cannot.
I realize that some of this is putting a lot of trust in the users. They could potentially create an incorrect unit that causes havoc. But the reality is, as long as people don’t have the units they want, they will do this anyway. I’ve seen people either create a number parameter, text parameter, or just pick an existing data type and not display the units (so on paper it looks fine, but in the model it’s wrong).
If the requests above are technically challenging. It would be great if all (or even one or two) of the parameter types/units below could be added:
Type of Parameter
"Type of Parameter" already exist?
Common Units
Unit Symbol
Application:
Energy per Unit Time/ Power/Heating Load
Yes
Thousand British Thermal Units per Hour
MBH
This is a US industry standard for heating capacities.
Volumetric Flow/ Flow/Airflow
Yes
Cubic Feet Per Hour Liters per Hour
CFH L/H
CFH is a US industry standard for gas flow rates. I think just about everyone else in the world used Liters per Hour. I know that Revit doesn't support compressible flow (yet?), but we could at least get the appropriate units as a starting point
Rotational Speed
No
Revolutions Per Minute
RPM
Motors, blades, impellers
"Mass per Unit Time" or "Mass Flow Rate"
No
Pounds per hour Pounds per minute Kilograms per hour Kilograms per minute
LBS/HR LBS/M KG/H KG/M
Often used for fluid flow. Especially steam
Date
No
Date
varies
numerous
Other posts I could find where someone is asking for units in one form or another:
https://forums.autodesk.com/t5/revit-ideas/we-would-like-to-have-pcm-as-an-unit-symbol/idi-p/6368720 https://forums.autodesk.com/t5/revit-ideas/project-units-create-a-customized-symbol/idi-p/6488139 https://forums.autodesk.com/t5/revit-ideas/adding-liter-by-hour-unit/idi-p/7849132 https://forums.autodesk.com/t5/revit-ideas/project-and-field-formatting-mbh-units/idi-p/7487342 https://forums.autodesk.com/t5/revit-ideas/new-unit-for-piping-in-wg/idi-p/6518610 https://forums.autodesk.com/t5/revit-ideas/horsepower-please/idi-p/6658202 https://forums.autodesk.com/t5/revit-mep-forum/how-to-create-units-kg-h/m-p/6840488/highlight/true?_ga=2.96243679.294445781.1546433687-1701866626.1527621482#M38001 https://forums.autodesk.com/t5/revit-ideas/regional-date-formats/idi-p/6530574 https://forums.autodesk.com/t5/revit-ideas/take-date-format-into-project-units/idi-p/8301389 https://forums.autodesk.com/t5/revit-ideas/i-wish-dates-were-real-dates-and-not-free-form-text/idi-p/7724435 https://forums.autodesk.com/t5/revit-ideas/quot-date-quot-parameter-type/idi-p/6323051 https://forums.autodesk.com/t5/revit-ideas/revolutions-per-minute-needs-to-be-added-as-a-unit-within-revit/idi-p/7445011
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