We haven't actually installed the stove yet (so I really can't do a proper rating) as we need to wait until after the 2022 holiday's when my local stove store is open in order to buy the ICC Ultra Black stove pipe segment we need. Since I currently have an ICC Excel chimney and stove pipe (this stove will be a replacement for a Jotul F3CB that was professionally installed in 2006 along with the Excel chimney) I will stay with the Excel. I don't foresee any install issues and operating problems so the rating should be good to go, but if I have any questions, I will certainly contact you.