I need inform every MEP object´s room. Is there a node in Dynamo that returns the room of an object like a faucet or a kitchen sink?
Try Elements in Room from Archilab
ArchiLab package has a node called GetRoomAtPoint. Get the location of the element then use that ArchiLab node. The node is based on the API method of same name. Search forum for more information on this node.
There is also the Element ToRoom node in the Genius Loci package which uses several methods to find the room.