Answer to Question 1
These are picked green and must be ripened for marketing. Banana rooms must be airtight. Refrigeration is provided by using a refrigerant other than ammonia. A design temperature difference of 15oF and a refrigerant temperature of 40oF are considered good practice.
Answer to Question 2
Specially engineered diffusers or nozzles distribute warm water at the top of the tank and cool water at the bottom. This provides for a separation between the cool supply water and the warm return water.