I had a single barrel stove in my workshop for several years.  The roof seal leaked a bit and water eventually
rusted it out.  So in addition to a better roof seal, I decided to move up to a double barrel kit.  This setup works
very well.  My workshop is about 14' to the trusses and the area is about 40'x40' and uninsulated - and not sealed around
the roofline either - i.e. very drafty!  Anyway, with a fan behind the stove it will warm the workshop enough to work.
Next to the stove it will get to t-shirt temps.  These pics are prior to being installed in the workshop.
Click on any image below to view a larger (around 640x480 pixel) image.