20 September 2011

ASSESSMENT OF NATIONAL BENEFITS OF RETROFITTING EXISTING SINGLE-FAMILY HOMES IN UNITED STATES WITH GROUND-SOURCE HEAT PUMP SYSTEMS


This report assesses the potential national benefits of retrofitting U.S. single-family homes with state-of-the-art ground-source heat pump (GSHP) systems at various penetration rates. The benefits considered include energy savings, reduced summer electrical peak demand, consumer utility bill savings, and reduced carbon dioxide (CO2) emissions. The assessment relies heavily on energy consumption and other data obtained from the Residential Energy Consumption Survey conducted by the U.S. Department of
Energy’s Energy Information Administration. It also considers relative differences in energy
consumption between a state-of-the-art GSHP system and existing residential space-heating, space-cooling, and water-heating (SH–SC–WH) systems, which were determined with a
well-established energy analysis program for residential SH–SC–WH systems. The impacts of various climate and geological conditions, as well as the efficiency and market share of existing residential SH–SC–WH systems, have been taken into account in the assessment.