IEA Annex IX: Minimum ventilation rates and measures for controlling indoor air quality.

From a viewpoint of energy conservation air infiltration and ventilation have to be minimized. A certain amount of fresh outside air, however, has to be supplied to a building in order to maintain healthy and comfortable conditions for theinhabitants and to avoid structural damage. The optimization of these adverse requirements will result in guidelines for minimum ventilation rates which are just large enough to meet the indispensable fresh air demand but small enough to avoid useless waste of energy. The work which has been performed under this annex is believed to be an important step towerds the establishment of objective and common criteria necessary to determine minimum ventilation rates.