Energy Conservation Program: Test Procedure for Direct Expansion-Dedicated Outdoor Air Systems

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The U.S. Department of Energy ("DOE") is publishing a supplemental notice of proposed rulemaking ("SNOPR") to establish a test procedure for direct-expansion dedicated outdoor systems ("DX- DOASes") pursuant to the Energy Policy and Conservation Act, as amended. This document presents an updated proposal based on stakeholder feedback received in response to the July 7, 2021, notice of proposed rulemaking. DOE is revising its proposals regarding the terminology used to describe the equipment at issue and to provide additional direction for testing equipment with special components. DOE welcomes written comment from the public on any subject within the scope of this document, as well as the submission of data and other relevant information.