Evaluation and demonstration of domestic ventilation: state of the art.

The IEA Annex 27, "Evaluation and Demonstration of Domestic Ventilation Systems" is aiming at developing tools by using the most developed computer models and equations available including modul development. Before staring up all the simulations an in depth review of the variables influencing the evaluation of a ventilation system have been done and a report is to be published. All parameters are needed to be mapped so that realistic assumptions can be made for the simulation phase. In the review is also included the models that can be possible to use for simulations of indoor air quality, thermal comfort, water vapour content, giving the possibilities to calculate the life cycle cost. In the review report is given facts about housing statistics, population densities, moving pattern. The residents' behaviour is given for time spent in the dwellings, airing pattern etc. The loads, that have to be dealt with, are given by reviewing the present results on particles, NOx, VOCs. The AIVC TNs have been used for the chapters concerning standards and leakages in dwellings. Also emissions from radon, landfill spillage, garage, and combustion can be influenced by the ventilation system and that have also been dealt with.