Interesting posts regarding hot Cat and no flames. As a newbie I was trying to throttle down the air intake and the stove kept getting hotter. No flames just some splits coals. I didn't let it get to 700 but was at 600 and rising when I bypassed the CAT. I am amazed how much heat the CAT can put out without flames. Sort of makes you rethink everything you thought you knew about burning wood. I have recently been burning with a little more flame (nicer to look at) and I notice the stove top rarely goes above the 500 range. With a little more air (Intake at 1 - 1.25) the glass also stays cleaner. I'm waiting for some really cold weather to see how well it performs. Rick D.