Todd said:Cruising 500-650 stove top relates to about 240-300 external stack temp about 20" up for me.
Really? That's pretty much exactly what I see on my Vigilant with the bypass closed. So I'm not running higher flue temps than if I was using a cat stove, rarely see any visible smoke, yet I burned nearly 6 cord last year. Go figure. Never, ever a smoldering fire, though. The stove is always active and hot. Maybe that's the difference?