It has been estimated in the Energy Conservation in Buildings and Community Systems Strategy Plan (IEA, 1994c) that about one quarter of all energy is consumed in dwellings within the countries of the Organisation for Economic Co-operation and De
In the frame of the European standardization work, an ad hoc group of CEN TC 156, WG2 Mechanical and natural powered residential ventilation , is presently working out calculation methods for the determination of air flow rates for dwellings. A first draft standard has been prepared and is currently under revision by the working group and experts of the national CEN shadow committees. Since the draft with its annexes is rather comprehensive, this article summarizes only roughly the basic assumptions and the methods developed so far, without giving the definitions and equations in detail.
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