The room must have adequate air circulation. Because uniform pulp temperatures throughout the load are essential for even ripening, the refrigerated air in the room must circulate at all times and uniformly throughout the load. The room should be constructed so that the air flow path from the cooler, through the load and back to the cooler is unobstructed. Proper air flow patterns are of the utmost importance. That is, the boxes should be offset to allow the air to circulate among all the boxes.
Bananas are very sensitive to temperatures.
Chilling will occur if the fruit is subject to temperatures below 56 F. for several hours. It causes the peel to have a smoky, dull gray appearance. This may not show up for 18 to 24 hours after chilling occurs. Cooked bananas result from excessively high temperatures. The peel will have a brown to orange appearance.