(This is a repeat of the Nov. 18 ME EET Seminar on campus) There are currently thousands of federal, state and utility programs starting up throughout he nation to retrofit existing homes. Most of these programs have moderate savings goals on the order of 20%, but to really make an impact and make the nations housing stock sustainable we need savings of 70% or more. This requires fundamental changes in the way we think about retrofits. We need better diagnostics to determine how houses perform – both before and after retrofitting, we need better ways of simulating home performance so we can make better decisions about what to do to a home to achieve these deep energy savings, we need better technological approaches to provide thermal comfort, lighting, hot water, entertainment and all the other utility a home provides while keeping homes healthy to live in a durable. A major question is: “do we need to change our lifestyles to make these large savings?” So, in addition to technology and engineering issues we need to deal with public policy and societal issues also. This seminar will explore these issues and look for places where the buildings research community can make significant contributions. For more information about this seminar, please contact: JoAnne Lambert 510.486.4835, or send e-mail to JMLambert[at]lbl.gov