This Standard covers the construction and operation of fixed pre-engineered dry chemical fire extinguishing system units and fixed automatic extinguisher units intended to be used in accordance with the Standard for Dry Chemical Extinguishing Systems, NFPA 17 and with the National Fire Code of Canada, as applicable; and; fixed pre-engineered wet chemical fire extinguishing system units intended to be used in accordance with the Standard for Wet Chemical Extinguishing Systems, NFPA 17A; and with the National Fire Code of Canada, as applicable. The revisions made to the Sixth Edition of ANSI/CAN/UL/ULC 1254:2019 was an editorial correction to include Annex B.

Products listed to this standard will be found in the Building Materials Hardcopy.