Core Bundles of Technologies to Achieve Deep Energy Retrofit with Major Building Renovation Projects in Europe, the United States and China (OR-16-003)

As a result of numerous pilot projects conducted all over the world, it was demonstrated that energy use reduction in commercial and public buildings can been reduced by more than 50% after renovation, and that some renovated buildings have met the Passive House Institute energy efficiency standard or even Net Zero energy state [1].  This paper summarizes the results of these studies. To evaluate cost effectiveness of deep energy retrofit (DER) using “core technologies” bundle, compared to typical building renovation based on minimum energy requirements, the paper proposes the use of net present value (NPV) of the difference in energy savings to estimate the budget increase limit. Since most of parameters required for LCC analysis differ not only by the individual country but also within the country (first costs and labor rates, energy rates, life of the project, inflation and discount rates, etc.), the concept of Scalar Ratio [8] is used to calculate limitations in renovation budget increase.