Guidelines for minimum ventilation rates: the IEA Annex IX.

The participating countries of Annex IX "Minimum Ventilation Rates" study emission rates and time dependence for building materials and their dependence on various factors including human behaviour; indoor transfer and interactions; control and air treatment; modelling indoor pollution including economic and social factors; strategies for indoor air pollution control under the restraints of energy conservation. The results of this international programme will be pooled to produce recommendations for guidelines. The paper gives a general view of the state of the art, intermediate results and an outlook on the participating countries' contribution to the joint target.