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In buildings significant untapped cost-effective energy saving potentials remain. Therefore, the building sector is at the heart of many policies and strategies aiming to increase the efficient use of energy, to further promote renewable energy use. A major concern is, that strategies and resulting measures do not yield the expected savings. It is well-known that too often energy efficiency renovations fail to achieve predicted savings in practice and also very low energy buildings seem to be vulnerable to have higher real than calculated consumption. This gap becomes obvious in a world where both asset based (i.e. calculated) energy performance certificates (EPC) and consumption based EPC are allowed.
The major question that we want to address in this discussion paper is, to what extent the just updated energy performance of buildings legislation (EPBD) and specifically the Smart Readiness Indicator (SRI), which is under development, may have on reducing that gap and what secondary benefits this may have. This comes with a closer look at the complementary function the SRI may have in relation to EPC.