I have one of these in my basement and I love the stove. I just found the literature that came with it. It says that it can heat 5500 - 10,000 cu/ft. Is this in any way a realistic number? I am struggling to keep my basement over 65 degrees and am left wondering if I am being too gentle on the stove? I usually have it going at around 500- 600 stovetop. Should I be letting it go higher? Thanks in advance for any suggestions.