| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method and device for indoor air for obtaining a deodorization effect, sterilization effect and humidity control effect as well as suppression of asthma and pollinosis, improvement of the allergic diathesis, etc. by utilizing chemical element conversion materials. SOLUTION: The chemical element conversion materials 9 containing ores to naturally radiateβrays are installed in a living space or the surroundings of the living space, for example, a space segment 11 under the floor of a house. The ambient air is then taken into a room 8 by natural ventilation or force ventilation.
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