| Summary: | 碩士 === 國立臺灣科技大學 === 建築系 === 90 === Recently，the use of double-skin facades has gained increasing popularity in Europe and America for its better performance and securities. However，the hygrothermal climate in Taiwan，glass double-skin facades may not to be suitable for use.
The aim of the thesis was to integrate ventilation, porosity and permeability of properties of external wall in local climate with double-skin facades，for achieving to improve indoor environment and reduce energy loads. This research evaluates the feasibility of using and the effects of improvement in indoor heat environment by means of compared full-scale experiments. The experimental porous material was perforated aluminum panel.
A result of indoor heat environment was improved by installing porous in the outer façade of opening. Further, this study discussed the reduced effect of indoor heat environment factors. The better the reduced effect was, the less the porosity was. As porosity was the same, the reduced effect of less aperture（or more aperture numbers）was better than the bigger aperture.
Using porous materials in the outer façade of opening，the reduce effect was for the most part of solar and thermal radiation. Therefore, utilizing porosity of porous materials evaluates the reduced effect of heat loads of opening. In terms of shading coefficient（ki） and reduced coefficient of heat loads were to act as estimate of indoor heat loads. Furthermore, the shading coefficient also was to act as design parameter of ENVLOAD.
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