The Model ESFR-1 Pendent Sprinklers are “Early Suppression Fast Response Sprinklers” having a nominal  K-factor of 14.0.They are suppression mode sprinklers that are especially advantageous as a means of eliminating the use of in-rack sprinklers, when protecting high-piled storage.The Model ESFR-1 is primarily designed for use with storage of most encapsulated or non-encapsulated common materials including cartoned unexpanded plastics to 35 ft. (10,7 m) high. In addition, the protection of some storage arrangements of rubber tires, roll paper, flammable liquids, and aerosols can be considered.