There may be posts on this but I have not poured through them. I am seroiusly thinking of pulling the trigger on a new Buck Stove but I am on the fence 94 non cat or 91 cat. My question is not which one but what is the average life expectancy of a cat. I always burn good quality wood (4 years ahead at least). I'm sure there are variables, I am just looking for some averages and input.