Tyco Fire & Building Products' Ultra K-17 Control Mode Sprinkler with a 16.8 K factor has been approved by Factory Mutual for use in cold storage applications without the need for in-rack sprinklers. This product is approved to protect both Class 1 and Class 2 commodities up to 35 feet (10.5 meters) high in a 40-foot-high (12.2 meters) building, and replaces large drop sprinklers in high-pile, cold storage applications. Benefits of this product include a larger maximum design space of 40,000 square feet, and it can be designed for a much more responsive water delivery times that are within 30 seconds of sprinkler operation. Tyco Fire & Building Products. Circle 421.