The journey to 15 million TR6 valves began in 2003, when the minimum seasonal energy efficiency ratio rating for residential air-conditioning systems in the U.S. was SEER 10. 

Last year, during the 2016 Group B cycle, six code change proposals were submitted to add maximum plumbing fixture flow rates to the International Energy Conservation Code

AHRI and its industry partners have advocated for a broader interpretation of what constitutes an "error" warranting reconsideration of the substance of a pre-published rule.

2017 revision of ASSE 1022 added a requirement that no copper alloys be used when in contact with the carbonated water, clarified the requirements for the maximum working pressure, and clarified many other procedural descriptions.