Coffee is typically roasted in horizontal rotating drums that are heated from below or fluidised bed roast chambers where the coffee is heated and moved by hot air. On an industrial scale, the burners are typically heated with gas or oil. Following roasting, the beans are cooled down to room temperature. They may then be packaged as whole beans ready from sale.
If required, the roasted coffee beans may be ground. This is done in a coffee grinder. Grind size needs to be adapted for each intended use (espresso machine, filter brew, instant coffee) as it will also influence the taste in the cup.