anyone have one of these or know how well they work. I've got a chance to pick one of them up at (what I think) is a reasonable price. The guy says its to big for his house. Says its rated for 2000-2500 sq ft and he has 1500.. LOL I wasn't going to tell him to build a smaller fire he bought it new in 79 and it still looks new.. fire bricks are even looking ok. Anyway.. any info is helpful.