rutan, what refrigeration consultant has to say.
When installed correctly and with the right safeguards, ammonia is a very efficient refrigerant, especially in large industrial applications. Due to its toxicity, however, ammonia has been at the center of a number of incidents that have led to loss of life, and as a result, there are grave health and safety concerns surrounding its ongoing use in the modern workplace. Additionally, ammonia systems generally require large capital investment due to the nature of the infrastructure involved.
Glaciem Cooling ? Glaciem Cooling
Why isn't ammonia used in motor vehicle air conditioners, nor household fridges and freezers, if as you say it's a no problem product? Used to be used in household items in the early days.