Kaladi Brothers Coffee pioneered the Michael Sivetz air roasting method in Alaska. The Sivetz Fluid Bed Roaster represents the most advanced technology in coffee roasting to date and is the method Kaladi Brothers Coffee first introduced more than 20 years ago. Here is video of roasting on a small scale, to show you the movement of beans during the introduction and continuous flow of fresh hot air. Take note of how the beans change color and pop during the process.