The Ajust'Air concept makes it possible to adjust between the entry loss of fresh air and the extraction of tainted air in the locality following the ventilation requirements marked by the carbon gas parameter.
Modulated ventilation would seem to be an interesting solution, capable of satisfying the demands of air quality in commercial buildings while avoiding thermal losses. The article gives an overview of this type of ventilation system.
In order to adapt ventilation losses to the actual use of the premises one must aim to control the energy loads due to air renewal while at the same time ensuring the maintenance of good indoor air quality for comfort and hygiene for the occupants. The principle applications are premises presenting wide variations in occupation: number of occupants, but also effective hours of use. These systems are effective and economic, but they must be designed and installed correctly.
Describes how CSTB undertook an experimental study of three schools in the Paris region to get to know the real quality of indoor air in educational buildings.
Adsorbant filters are used to reduce odours and gas concentrations in air. They are also used in industry as well as in the commercial environment to treat ventilation air in buildings and motor vehicle conditioning systems. The article discusses methods to determine their performance.
Discusses this rarely examined aspect of indoor air quality. Specifically describes a study carried out on an unoccupied apartment on a road with heavy traffic, on the third floor of a block dating from 1955. The aim was to evaluate the transfer of pollution between outside and inside. Parameters considered were ventilation status, season, outdoor pollution levels, and the presence of adsorbing materials.
In discussion with the person in charge of provision for the many swimming pools in the Paris region, both municipal and school, the article gives and overview of the problems to be tackled in terms of dehumidification.
States that various gas techniques seem to be technically and economically of interest to ensure the heating of swimming pools: condensation heaters, the production of instant ECS, low temperature heated flooring, etc. Equally, cogeneration offers wide possibilities. The article gives an introductory note on each of these technologies.
States that air humidity in swimming pools must be closely controlled on the one hand for user comfort, and on the other for the durability of the building structure. Describes how the INSEP pool in Paris has opted for a partial thermodynamic dehumidification system. Finds that although the condensate levels were higher than recommended at time of measuring, this pool nevertheless showed satisfactory results in terms of energy consumption and costs. Also found that the heat demand of the pool compared favourably with an ordinary sports hall in relation to outdoor temperatures.
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