Ignore face based voids in Node "Element.geometry"

I don’t think you will get any assistance unless you show us what you have already done and what it is you wish to achieve, it sound on your post that we should already know what this is concerning and unfortunately we do not. Maybe try reading this and adjust your post accordingly:
https://forum.dynamobim.com/t/how-to-get-help-on-the-dynamo-forums/4677