[She never said it wasn't unsettling. There's a lot of technology far beyond their time there, Varric.

She laughs at his guess though. Oh, the mages would hate that...]

No, no, nothing like that. It's... well, I'm not quite sure how it works. There's not a mage in every room, but you can say what temperature you'd like it to be and the room would change it for you.

[Maybe there was a mage controlling it somewhere...]