Defrosting is a thing of the past With the NoFrost system you never have to defrost your Miele refrigeration appliance again. Circulation cooling ensures that cold, dry air is evenly distributed in the interior, preventing ice formation. This means no ice deposits on your frozen food, and allows drawers to be opened and closed easily without layers of ice interfering with them. NoFrost offers maximum convenience for freezing food and saves the hassle of defrosting – forever.