I do not own a OWB or a gassifier yet. There is a tremendous amount of differences between all the different types (OWB and gassifiers) as well as differences b/w various gassifiers and owb's. I was wondering if anyone has seen (or could come up with) a list or way of comparing various wood burning units side by side. Kind of like when you go to kelly blue book (www.kbb.com) to compare various cars that you might want to purchase as far as size, fuel economy, specs, cost, etc. It would also help people learn the differences and strengths and weeknesses of each unit. Every manufacturer thinks theirs is the best but obviously, since there are so many people in this forum with different and yet happy installations, there is not just one unit that is above all others. Just like a Honda Civic doesn't suit someone with 6 kids but would be great for a single person who commutes a long way.