Sorry Jace, I was distracted when I was doing the post on pipe height. Now we know what your dealing with by the pictures that Begreen posted. I do know as he said that those units do require a massive amount of air. We had lots of those around my area when I was a kid and I can tell you the thing I remember most was the smell of smoke in the house. The ones I remember most, that did work, were installed in an "A" frame house or some other high ceiling, big room... So in other words the draft issues your battling do not surprise me. Furthermore I am not sure one of those units would work with any elbows of any shape. The installs I remember from childhood were straight up and tall 6" pipe. Perhaps somebody else could help us out here? I can tell you for sure that there is no way that a pipe of 10-12 total feet with elbows of 45 degrees would be enough to draft properly. The other thing with that unit that will be a requirement is the use of a fire grate to slightly elevate the burning wood off the floor of the unit. This will provide air flow around the fire that will "speed up" the burn a bit. I say the best thing you could do at this point is add say about 3ft. of pipe to your height. I also say you will battle the draft with that fireplace till the cows come home... Sorry my friend but they never were a really great heater.