MTU alumni here, as are wife and kids - still spend a lot of time up in the Keweenaw
To keep in the theme of the thread - Gotta love that the Wads dorm at MTU has a sauna
In 2005/2006 mcnair had one as well, guessing they still do. The "stove" was a 100+ year old cast iron radiator with a 1" ball valve connected to the 60 psi steam line from the central heating plant. I've been in a lot of saunas, and that thing was the most powerful heater I've ever experienced. You'd crack that valve about 25%, throw a pint of water on the radiator, and hang on. Only issue we ever had was the exterior doors locking at night. We got locked outside with no way to get back in after jumping in the snow, finally got someone to let us in and our hair and shorts were frozen solid.