In case any of you wanted to know what infrared gas burners looks like, here's a picture. My larger roaster has two of these running down the length of the drum. They're considerably less polluting than the more common atmospheric burners, but you need to read farther ahead on your roasting plan because it takes a while between changing the burner setting and seeing the impact of that change.
tech support
Do you think I've gotten across the idea that they need to send the little part with one fan and not a third instance of the giant assembly with 2 fans that they keep sending me?
I usually try to avoid this message style because it's not nice, but so far this issue has been handled with such an enormous heaping pile of fail that I don't know what I can do to convince them to follow through and actually do the thing they said they'd do.
Author of Typica software for coffee roasters.