Viking claims the industry's first 14K Early Suppression Fast Response (ESFR) Upright Sprinkler. May be installed above certain cross bracing and in web members, allowing warehouse storage height up to 25 feet under a 30-ft. ceiling and 30 feet under a 35-ft. ceiling. Fast response fusible link; K-factor of 14.0; special deflector directs water downward into the fire plume.