ARI has announced that the association, in conjunction with ASHRAE has jointly adopted ISO Standard 13256-1-1998, "Water-Source Heat Pumps -Testing and Rating for Performance: Part 1 - Water-to-Air and Brine-to-Air Heat Pumps: 10/24/2001" and ISO Standard 13256-2-1998, "Water-Source Heat Pumps -Testing and Rating for Performance: Part 2 - Water-to-Water and Brine-to-Water Heat Pumps: 10/24/2001" as American National Standards.