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The scope of this work is to provide a standard field monitoring protocol for evaluating the installed performance of HPWHs in residential buildings.

Prepared by:  National Renewable Energy Laboratory

Published:  October 2013

Building America Case Study Project Name: HPWH Evaluation. Location: Northeast. Years Tested: 2010-2012. The U.S. Department of Energy Building America team Consortium for Advanced Residential Buildings (CARB) quantified the in-situ performance of three recently released HPWH products for more than one year.

Prepared by:  US DOE Building America program

Published:  December 2013

This project comprehensively draws on laboratory studies and, importantly, two previously conducted field studies. It augments the field studies by measuring water heater performance in climate zones and installation locations not previously observed. 70 sites had been previously studied in the field and this project added 50 more.

Prepared by:  Northwest Energy Efficiency Alliance

Published:  March 2, 2015

This evaluation quantified the in-situ performance of three recently-released HPWH products (General Electric GeoSpring™, AO Smith Voltex®, and Stiebel Eltron Accelera®300) through the installation and monitoring of 14 units in Massachusetts and Rhode Island for over one year.

Prepared by:  Steven Winter Associates, Inc.

Published:  June 26, 2012

This project sought to assess whether HPWHs can productively store energy and participate in demand response programs, thereby supporting the broadest application of the new efficiency standards.

Prepared by:  Northwest Energy Efficiency Alliance

Published:  September 29, 2014