What is ammonia's refrigerant ASHRAE classification?

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Multiple Choice

What is ammonia's refrigerant ASHRAE classification?

Explanation:
ASHRAE 34 classifies refrigerants by two traits: toxicity (A for lower toxicity, B for higher toxicity) and flammability (numbers 1–4, with 1 being non-flammable). Ammonia is known for being highly toxic, but it is not flammable under normal conditions. That puts it in the toxic, non-flammable category, which is labeled B1. So the complete and most accurate designation is B1, reflecting both its high toxicity and its non-flammability. This is why safety measures for ammonia focus on ventilation and leak detection rather than fire-only protections.

ASHRAE 34 classifies refrigerants by two traits: toxicity (A for lower toxicity, B for higher toxicity) and flammability (numbers 1–4, with 1 being non-flammable). Ammonia is known for being highly toxic, but it is not flammable under normal conditions. That puts it in the toxic, non-flammable category, which is labeled B1. So the complete and most accurate designation is B1, reflecting both its high toxicity and its non-flammability. This is why safety measures for ammonia focus on ventilation and leak detection rather than fire-only protections.

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