Energy Impacts of Envelope Tightening and Mechanical Ventilation for the U.S. Residential Sector

TitleEnergy Impacts of Envelope Tightening and Mechanical Ventilation for the U.S. Residential Sector
Publication TypeJournal Article
Refereed DesignationUnknown
LBNL Report NumberLBNL-6053
Year of Publication2013
AuthorsLogue, Jennifer M., Max H. Sherman, Iain S. Walker, and Brett C. Singer
JournalEnergy and Building
Volume65
Pagination281-291
Date Published01/2013
KeywordsASHRAE 62.2, energy bills, hvac, retrofit, WAP, weatherization
Abstract

Effective residential envelope air sealing reduces infiltration and associated energy cost s for thermal conditioning , yet often creates a need for mechanical ventilation to protect indoor air quality. This study estimated the potential energy savings of implementing airtightness improvements or absolute standards along with mechanical ventilation throughout the U.S. housing stock. We used a physics - based modeling framework to simulate the impact of envelope tightening, providing mechanical ventilation as needed. There are 113 million homes in the US. We calculated the change in energy demand for each home in a nationally representative sample of 50,000 virtual homes developed from the 2009 Residential Energy Consumption Survey. Ventilation was provided as required by 2010 and proposed 2013 versions of ASHRAE Standard 62.2. Ensuring that all current homes comply with 62.2 - 2010 would increase residential site energy demand by 0.07 quads (0.07 exajoules (EJ)) annually. Improving airtightness of all homes at current average retrofit performance levels would decrease demand by 0.7 quads (0.74 EJ) annually and upgrading all homes to be as airtight as the top 10% of similar homes would double the savings, leading to roughly $22 billion in annual savings in energy bills. We also analyzed the potential benefits of bringing the entire stock to airtightness specifications of IECC 2012, Canada's R2000, and Passive House standards.

URLhttp://www.sciencedirect.com/science/article/pii/S0378778813003460
DOI10.1016/j.enbuild.2013.06.008
Refereed DesignationUnknown
AttachmentSize
PDF1.29 MB