1. The air in the vehicle is then neither cooled nor dehumidified.

2. The dehumidification wheel (16) is warmed and dehumidified by passing exhaust air through it.

3. Laboratory equipment for generating a stream of filtered, dehumidified and thermally controlled gas for laboratory use

4. Natural-watered lawn is a very good cooling source stabilizing temperature, and using dehumidified air to create comfort.

5. In the second operation, air is dehumidified by the second humidity adsorption element (82) and the first humidity adsorption element (81) is regenerated.

6. In the first operation, air is dehumidified by the first humidity adsorption element (81) and the second humidity adsorption element (82) is regenerated.

7. In the air conditioning units, cooling elements (16, 21, 53, 61) are provided by which inflowing air may be dehumidified by water vapour condensation.

8. In the adsorption elements (81), (82), when first air is dehumidified in the humidity control-side passages (85), adsorption heat produced is absorbed in second air of the cooling-side passages (86).