Randy G. wrote:
I just put eight ounces of green coffee beans in my shorts to find out if you are right!
Did you get to first crack before bedtime? What about the drying phase, did you have a bowl of baked beans to help with airflow?
My understanding of infrared burners for roasting and grilling is more sales from Diedrich and grill companies. diedrich's pitch for using them is for a more uniform heating of the drum with less hot spots as well as a more efficient burning of the gas. The only experience I have with atmospheric burners is cooking on a propane grill at friends homes (I am a hardwood charcoal user at my home) and each one of these grills had their particular hot spots and cool spots over the burners.
The size of my IR burner on a 1kg machine is 5 1/4" x 7 1/4" at 8000 btu an hr at max, the burner is under the front 7 1/4" of the drum leaving 2 1/2" of the rear of the drum with nothing under it. Apparently the IR burner is the reason that the Diedrich rotates at about half the speed of other roasters, at least for the IR series. Take this with a grain of salt since I am only a user and not a manufacturer of roasters.