Tools for evaluating domestic ventilation systems (IEA Annex 27).

This paper is describing the preliminary results of the Annex 27 work aiming at developing simplified tools for evaluating domestic ventilation systems. In this paper is given the tool to evaluate a system's ability to deal with different indoor air quality (IAQ) matters. In the work is used sophisticated simulation programs studying pollutant concentration either for each person or in an individual room. The evaluation is to be applied on houses that mainly are heated. This means that the tools are restricted to the heating season. Assumptions, based on previous research works, are set up for a number of parameters. The total number of combinations are about 17 500 and have been reduced to 17 4 by statistical methods for multi variant parametric studies and fractional factorial analysis. With this reduction of the number of combinations it is possible to make all the runs even with sophisticated multizone models. The result is presented as coefficients for the various pollutants.