What is the ASHRAE safety rating of R-1233zd?

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Multiple Choice

What is the ASHRAE safety rating of R-1233zd?

Explanation:
Understanding ASHRAE safety ratings means looking at two traits: toxicity and flammability. A1 is the category for non-toxic and non-flammable refrigerants. R-1233zd has been evaluated and shown to have negligible acute toxicity and no flammability hazard under standard testing, so it is classified as A1. The other ratings would imply some level of toxicity or flammability, which doesn’t apply here. That’s why A1 is the correct rating.

Understanding ASHRAE safety ratings means looking at two traits: toxicity and flammability. A1 is the category for non-toxic and non-flammable refrigerants. R-1233zd has been evaluated and shown to have negligible acute toxicity and no flammability hazard under standard testing, so it is classified as A1. The other ratings would imply some level of toxicity or flammability, which doesn’t apply here. That’s why A1 is the correct rating.

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