OK, this is a bit strange, but... ... .
From the movie "Hang 'em High":
When Marshal Jed Cooper is brought to Judge Fenton's quarters there is a woodstove in the background. If you look at the stovepipe, it goes up, through two 90deg elbows and then into this strange looking double-tee loop arrangement before exiting out of the wall.
Any ideas what that loop thing is for? Perhaps some kind of heat exchanger?
Why is it oriented vertical as opposed to horizontal?

sp
From the movie "Hang 'em High":
When Marshal Jed Cooper is brought to Judge Fenton's quarters there is a woodstove in the background. If you look at the stovepipe, it goes up, through two 90deg elbows and then into this strange looking double-tee loop arrangement before exiting out of the wall.
Any ideas what that loop thing is for? Perhaps some kind of heat exchanger?
Why is it oriented vertical as opposed to horizontal?

sp