01Heat source and gas approval
Ask whether the burner, valves and flame supervision fall under the Gas Appliances Regulation (EU) 2016/426, which excludes appliances designed for industrial processes on industrial premises, and if so for the EU type examination. Electric roasters avoid that but draw a heavy load. Ask for the certificate number, not a CE sticker.
02Nominal batch versus usable batch
A 15 kg label is the green bean maximum. Many roasters run best below it for lighter roasts. Ask what batch the profile curves in the brochure were roasted at.
03Drum wall and airflow control
Drum thickness and material change how heat reaches the beans. Separate control of drum speed, burner and fan is what lets you repeat a profile. Ask which of the three the controller adjusts.
04Profile logging
Bean and exhaust temperature probes feeding roast software let you repeat a roast. Ask which probes are fitted, where, and whether logs export.
05Cooling tray and chaff
A slow cooler keeps roasting the beans after drop. Ask for cooling time on a full batch, and how chaff is collected.