Numbers and Titles



Includesdual-agent fire extinguishing systems systems that deliver carbon dioxide for fire extinguishing and suppression.
See21 13 00 for water fire-suppression sprinkler systems.
21 21 13Carbon-Dioxide Fire-Extinguishing Piping
21 21 16Carbon-Dioxide Fire-Extinguishing Equipment
21 21 23Nitrogen-Water Fire-Extinguishing Systems