This caused me to think of the years ahead when we installed plants. During that one week of test operation, the people who were going to take over were really, for the most part, inexperienced with ammonia. Ammonia commands respect, and ammonia has received that respect. Consider the fact that from 1834 up until the late 1920s, the majority of all refrigeration applications used ammonia. Naturally, since ammonia was available, refrigeration was put into hospitals, sanitariums, hotels, and was used for air conditioning.
Ammonia is the friendly refrigerant.
Consider the fact that immediately following World War II, fishing boat owners discarded refrigeration systems that did not use ammonia and installed systems using ammonia. We're never going to get caught out at sea with a boat load of fish and no refrigeration. This had happened to them before because of undetected leaks. Then they had a shipload of fish and no refrigeration. We must never overlook the fact that ammonia is the only refrigerant with a density less than one.