Abstract
Air humidity control technique with desiccant seems to grow into a major field of air ventilation systems. In 2002 Japanese government provided a rule for continuous air ventilation at least 0.5 times of air volume of house every hour. Also in Western countries to avoid mold and damp, dehumidifier with desiccant becomes popular in airtight residences. We started to develop high performance air-conditioning systems with desiccant ventilation units in 2005 under the direction of NEDO (New Energy and Industrial Technology Development Organization). To achieve the high performance and simple structure we aim to use absorption heat to regenerate adsorbents.