Autodesk / Autodesk/revit-ifc

Flow Units export to Ifc not correct (revit 2020)

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#444 2 comments 0 reactions 0 assignees View on GitHub
2020 IFC mapping in progress parameters-properties problem Revit
Dominant language
C#
Stars
637
Forks
225
PR merge metrics
No merged PRs in 30d

Description

If I export a Revit MEP model to Ifc the exporter(or revit) doesn't use the correct units for the flow parameter. It has to be L/s but in Ifc it becomes ft3/s. This is not correct, this unit isn't even available in Revit (by choosing by the project units).
I tested with base quantities and by a custom pset, both won't let me export the correct units. I also tested it with the unit volumetricFlowRate, also this values is in Ifc in ft/3.

Contributor guide

Open the contributing guide

Research direction

Reproduce the reported Revit 2020 export using a model with a flow parameter, then inspect the generated IFC units for base quantities, a custom property set, and volumetricFlowRate. Done means the exported flow value uses L/s rather than ft3/s in each tested representation.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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