NFPA technical committees for NFPA 13, NFPA 13R, and NFPA 13D have established new requirements that mandate the use of "listed" antifreeze solutions for new system designs. The requirements, which prohibit the use of traditional solutions, are aimed at preventing solutions from igniting when discharged from a sprinkler.
However, as NFPA Senior Fire Protection Engineer Matt Klaus points out in his latest column in NFPA Journal, a number of other freeze protection options exist. "Most of them have been around for years, but they have not been explored and refined as palatable design approaches by many designers simply because antifreeze was extremely cost-effective and efficient--or so they thought," says Klaus.
A few alternatives include a dry pipe system, heaters, and insulation. Read about these and other options in the November/December issue of NFPA Journal, and learn how NFPA has addressed antifreeze solution safety through its safety alerts and Tentative Interim Amendments.