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.
October 1, 2008 -- .September 30, 2013
Natural Resources Canada
Varennes, Quebec, CANADA J3X 1S6