Unlike the last transition, which shifted from the use of one nonflammable refrigerant to another, many of these new refrigerants are mildly flammable (A2L), so additional training will be needed in order to safely use them.
from Odor Management Plan in Controlling Smoke Odor https://ift.tt/wjmxP8t
via https://ift.tt/KBGjy9k
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