# Wall Area Interior (without wall openings) **URL:** \ **Category:** Revit\ **Tags:** python, geometry, dynamo\ **Created:** [October 19, 2022, 9:37am UTC](https://forum.dynamobim.com/t/wall-area-interior-without-wall-openings/82221 "2022-10-19T09:37:31Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![stewart.skyler](https://avatars.discourse-cdn.com/v4/letter/s/ccd318/32.png) [@stewart.skyler](https://forum.dynamobim.com/u/stewart.skyler)\ **Post date:** [October 19, 2022, 7:14pm UTC](https://forum.dynamobim.com/t/wall-area-interior-without-wall-openings/82221/9 "2022-10-19T19:14:55Z")
The simplest way is to use a selection node and let someone select the appropriate elements, then use their geometry to find the surface area to subtract. The other way, that I can think of, is to filter through the windows and doors in the project, and find the ones that are in that room. One could probably do this via the API using a FilteredElementCollector, but in lieu of that, try checking out this thread: > [@Selecting doors and windows from room X to room Y](https://forum.dynamobim.com/t/selecting-doors-and-windows-from-room-x-to-room-y/40577): > > Hey all, I build up my current dynamo from the work of @seandburke [Script works just fine in a test... not a real project](https://forum.dynamobim.com/t/script-works-just-fine-in-a-test-not-a-real-project/31631) I also added a user interface to let the user choose which rooms and what floor type he wants to generate. Here is the dynamo: [test3.dyn](https://forum.dynamobim.com/uploads/short-url/bepAZZ15Shx6eSOcoN5w7lV4W5x.dyn) (199.2 KB) What I would like to achieve is that when creating the geometries for the floor including the part under the doors, that it would only select the doors going outwards to another room, like this: [Capture] Becau… You could also use that clockwork node to get the walls associated with the room, and get the faces of the walls. From there maybe you could use the edge loops or something and figure out how to trim down the faces to just the sections you need. Those are what come to mind for me. Either way it sounds like you got your work cut out for you. --- _[View the full topic](https://forum.dynamobim.com/t/wall-area-interior-without-wall-openings/82221)._