As a point of interest here I can verify that a case of frozen peas, thrown across a grocery store walk in freezer, missing the intended target employee and hitting a sprinkler head, will break off and flood a 20 x 20 walk in freezer in just a few minutes, resulting in many hours with an ice chipper. None of the other heads will open, however the fire alarm will activate and the fire dept will respond.
Seems foolish to put fire sprinklers in a freezer.
