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Can a 5% H2/bal. argon mix be used indoors in an unclassified area without a cabinet and ventilation? I could not find the answer in NFPA55. Thanks.

Question asked by mmarone on Apr 3, 2017

Can a cylinder of 5% hydrogen / balance Argon be used in an unclassified indoor area without an enclosure or ventilation? If so, how many cylinders could be in this area?

Thanks. Mike