Net Zero Energy Solar Buildings – Tache 40 programme SHC de l’Agence Internationale de l’Energie
Energy use in buildings worldwide accounts for over 40% of primary energy use and 24% of greenhouse gas emissions. Energy use and emissions include both direct, on-site use of fossil fuels as well as indirect use from electricity, district heating/cooling systems and embodied energy in construction materials.
Given the global challenges related to climate change and resource shortages, much more is required than incremental increases in energy efficiency. Currently, a prominent vision proposes so called « net zero energy », « zero net energy », « net zero carbon » or « Equilibrium » buildings. Although these terms have different meaning and are poorly understood, several IEA countries have adopted this vision as a long-term goal of their building energy policies.
What is missing is a clear definition and international agreement on the measures of building performance that could inform « zero energy » building policies, programs and industry adoption.