An off-cycle defrost method is typically used on evaporators operating at a minimum of?

An off-cycle defrost method is commonly applied in refrigeration systems, particularly in situations where evaporators operate at temperatures above freezing, specifically when the minimum temperature is around 35°F. This method takes advantage of the natural increase in temperature that occurs during off-cycles when the compressor is not actively running.

Operating at this temperature range allows for efficient defrosting without compromising the performance of the refrigeration system. At temperatures below 35°F, moisture can build up more rapidly as ice forms, which would require more frequent and intensive defrosting methods, potentially leading to increased energy consumption and reduced overall efficiency. Therefore, off-cycle defrost is optimal above this threshold, as it helps manage frost build-up effectively while maintaining system efficiency.