Recently, residences are becoming more insulated and airtight for energy saving action. In such residences, floor heating (radiative system) and air conditioner (convective system) have become widely used. So the thermal comfort in rooms heated by floor heating or air conditioner was compared by the thermal manikin. The experiment for the thermal manikin was performed in the artificial climate chamber. When sensible heat loss became thermal neutrality, the thermal comfort in rooms heated by floor heating or air conditioner was compared by air temperature. In the result, for all conditions air temperature by floor heating was lower than that by air conditioner.
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