Calculation of actual consumption for single for family houses

This paper addresses the utility and the difficulties to predict the actual energy consumption of existing buildings, that can be useful to calculate true energy conservation potential taking into account the real usage of the building. True indoor temperature is of particular importance but also the availability of casual and solar gains. A sensitivity analysis on the set of behavioural parameters shows that the casual gains are highly dependent on the number of occupants at home and the lighting scenario, which requires to collect information about the occupants way of life. The paper describes the developed tools for that purpose and illustrates the complete procedure on a single family house in France.