FIGURE 2 Evolution of ASHRAE Standard 15. ASRE Engineers Initiate Development of First Refrigeration Safety Code for New York City 1914 1919 Code Expands to Regulate Refrigerating Machines & Refrigerants 1930 ASRE Publishes and ASA Approves B9 the "American Standard Safety Code for Mechanical Refrigeration" ASRE Publishes Updated Versions of ASA B9 1934 1950 ASRE Redesignates B9 to B9.1 Publishing Updated Versions 1958 1964 ANSI Approves ASHRAE B9.1 1978 Merger of ASRE and ASHAE Leads ASHRAE to Publish as B9.1 1971 ASHRAE Publishes First Version of ANSI/ASHRAE Standard 15 1989 ASHRAE Publishes Revised Versions of ANSI/ASHRAE Standard 15 2013 www.info.hotims.com/49810-39 40 ASHRAE JOURNAL ashrae.org N OVEM BER 2014