The recent demand for a low-fat diet has profoundly changed the effectiveness of conventional dry chemical extinguishing agents. Additives which make low-fat oils palatable, coupled with super-insulated deep fat fryers have rendered most dry chemical agents ineffective for fighting these types of fires. The concern has been so significant that a UL 300 test requirement was enacted calling for new agents and new designs for all systems installed or modified as of November 21, 1994. As a result only wet chemical systems manufactured after this date meet the requirements of UL 300. (Check with your fire protection professional to make sure your system is in compliance)