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DOE Issues Final Ruling on Test Procedures

ASHRAE reports that this December, the DOE issued a final rule on test procedures of small, large, and very large air-cooled commercial package air-conditioning and heating equipment. The rule references and discusses the following ASHRAE standards: ANSI/ASHRAE Standard 37-2009 Methods of Testing for Rating Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment, ANSI/ASHRAE/IES Standard 90.1-2013 Energy Standard for Buildings Except Low-Rise Residential Buildings, and ANSI/ASHRAE 127-2007 Method of Testing for Rating Computer and Data Processing Room Unitary Air Conditioners.

The rule itself clarifies indoor air-flow tolerance and adjustment specifications when meeting other rating conditions; goes into detail on the requirements for condenser head pressure controls; clarifies units of measurement for air flow; establishes a tolerance on part-load rating points and specifies the ambient temperatures used for the part-load rating points; and defines the term, “integrated energy efficiency ratio.”

The DOE also issued a pre-publication version of a final rule revising the efficiency test procedures for residential furnaces and boilers. This final rule does not adopt any of the significant test procedure changes presented in the March 2015 notice of proposed rulemaking, including the proposed change to update the reference to ASHRAE Standard 103 from the 1993 edition to the 2007 edition. The final rule does adopt a protocol to verify the function of “automatic means for adjusting water temperature” required on residential boilers.

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