I'm looking at buying a new quadrafire 3100 to replace my Yosemite. My biggest question is what burn times is everyone getting with fir. I can only get about a 5-6 hr burn in my tiny 1.5 cu. ft. firebox. I'm looking for at least 8hrs. I'm open to other stove suggestions too but as of now I can pick up a 3100 for $1500.