Discussion paper on IEA annex XXI calculation of energy and environmental performance of buildings

The objectives of this discussion paper are: to define the new Annex on "Calculation of Energy and Environmental Performance of Buildings"; to determine feasibility of the Annex i.e. whether the full Annex should go head or could the objectives of the Task be accomplished through other means such as conference, workshops, international associations; and to describe various sub-tasks of the Annex (assuming it is needed).