AHRI’s Cooling Standards Subcommittee (CSS) convened by web conference on November 29, 2011, and reviewed revisions to four AHRI standards.

Pending follow-up letter ballot votes of absentee members, the CSS approved the following for publication:

-          AHRI Standard 550/590 (I-P) – 2011, Performance Rating of Water-Chilling and Heat Pump Water-Heating Packages Using the Vapor Compression Cycle

-          AHRI Standard 551/591 (SI) – 2011, Performance Rating of Water-Chilling and Heat Pump Water-Heating Packages Using the Vapor Compression Cycle

-          AHRI Standard 1320 (I-P)-2011, Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use with Secondary Refrigerants 

-          AHRI Standard 1321 (SI)-2011, Performance Rating Of Commercial Refrigerated Display Merchandisers and Storage Cabinets for Use with Secondary Refrigerants

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