Isolate a ducting system

I’m trying to Isolate the Return Air system in my model. I can get all my return air elements but the Isolate node doesn’t work for me

Hi @Dan_Deery

Currently your filtering Strings. You need to filter elements. Connect your Elements list and then you will be able to isolate elements.

Kulkul.

Thanks for your feed back. So whats the best way to do that