Discusses the new concept of hybrid ventilation, and the objectives of IEA ECBCS Annex 35 research in this area. Important areas of research are the development of control strategies, theoretical and experimental studies, the development of a decision tool, the implementation and demonstration of hybrid ventilation, reporting and expected results.
The European NatVent project, "Overcoming Technical Barriers to Low Energy Natural Ventilation in Office Type Buildings in Moderate and Cold Climates" is completed. Of particular interest was the targetting of building and countries where summer overheating from solar and internal gain can be significantly reduced by low energy design and good natural ventilation. In addition, natural ventilation solutions to buildings located in urban areas where external air pollution and noise levels are usually regarded as being high were addressed.
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