Change Component Material by System Type

I have different System type:
Exhaust Air is "RLT_Aussenluft"
Supply Air is "RLT_Zuluft"
Return Air is “RLT_Abluft”

I want to choose or to find all of the Elements (duct, elbow, …) of the same System (Exhaus Air for example) and change the parameter “Material”

Would be that possible?

Thanks a lot in advance

@wuwengineering, I moved this to a new topic as that other one was over a year old.

Please go ahead and provide screenshots and any relevant files to show where you are now.