I have an update. After 11 months (February 2012 to now -no burning during summer of course) my rectangular honey comb catalyst is falling apart. I went to check it to clean it and part of it crumbled and now it has a hole. That explains the reason for the glow on the left but not much glow on the right side. Now i will likely have to replace it...have to check the warranty and check with the hearth store i bought it from. What a pain this stove is. It saves you firewood but seems costly to run and repair it.