I love these threads and this is a zombie thread if there ever was one, even pre-dating John Beere's epic build.
Been thinking of doing this very soon. I want to build a cool/lagering room and will serve on the opposite side of the long wall. Likewise, I also have been considering ducting in an air exchanger to control temps in my fermentation chamber which will be attached to one end of the room. I have the space in the basement and the ok from the wife, I just need to do some more planning/thinking.