What does "Function", the parameter built-in parameter for wall type, do?

[ysautodesklover]

Dear devoted Revit users,

I have been researching for the effect by setting the "Function" parameter in the wall setting.

I used to think this does nothing but it can be used to filter in a schedule.

However, my coworker found the different behavior recently so I again started wondering it might influence data management later on if I don't set right.

What I found so far is when I set the value of Function as "Foundation" I can only draw the wall with depth and I cannot draw with height.

Otherwise, I don't see any differences.

I would like to comprehend the use of the built-in parameter.

It would be great if you can share your knowledge with me.

Thank you in advance.

Yuki

[barthbradley · Accepted solution]

Basically mean nothing.  The Function you should educate yourself on ii the Wall Layer Function.  

https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/EN...

[AWalshGHT]

Isn't the Function Parameter used in determining if an element is interior or exterior facing for HVAC Load Analysis?

[SteveKStafford]

Check out the Autodesk article on this parameter and notice the sub articles.