Yes, they can be used together to create one room.

You don’t pair them though, if that’s how you’re trying to set them up. Go to settings for the room with the Era, and there should be an option to Add Sub. 

Much like the OP’s previous Sub post, they were likely only enquiring about compatibility rather than experiencing any setup issue.

Apologies; my mind-reading ability is clearly less advanced than yours.    
 

That said, it’s not possible to pair a Sub Mini with anything, so I still believe my post was valid to clarify matters for anyone else reading the thread.