IEA Annex IX 'Minimum Ventilation Rates' - Survey and Outlook.

Eleven countries are cooperating to establish guidelines for minimum ventilation rates which are sufficiently large to meet the demand for outdoor air in buildings without unnecessarily wasting energy. The most important pollutants have been identified as: carbon dioxide, tobacco smoke, formaldehyde, radon, moisture, body odour, organic vapours and gases, combustion products and particulates. To a certain degree some of thesesubstances can be used as indicators for acceptable air quality to establish minimum ventilation rates. The paper gives a general view of the objectives of Annex IX, the first results and of the relation to the subject area of Annex V. It additionally gives an outlook on the future cooperation of the participating countries.