Carbon Dioxide Systems, NFPA twelve; these systems are Employed in overall flooding applications in Areas that aren't habitable, as carbon dioxide is dangerous
Deluge sprinklers—sprinkler heads are usually open up as https://patch.com/north-carolina/raleigh/classifieds/gigs-services/467764/safeguarding-lives-and-property-all-american-fire-protections-quarter-century-of-excellence