The Nesco Pro Coffee Bean Roaster is a super easy to use machine that brings the freshness and quality of gourmet coffee to your kitchen. This roaster utilizes a patented catalytic exhaust system that eliminates almost all of the smoke and leaves only the pure aroma of roasted coffee, making this machine perfect for those who prefer to roast indoors. The Nesco Pro is also significantly quieter than many of the other roasters on the market. To accommodate those who prefer dark roasts, a second fill line was added on the roast chamber. This unit also boasts a glass roast chamber that allows for easy viewing and monitoring of your roast progress giving you added control. Roast times typically range from 20-30 minutes.