Taiwan has a climate with a high temperature and humidity, which leads to high indoor moisture that causes biological pollutants. Moisture buffering materials are considered an efficient method for controlling the high indoor moisture. In this study, the hygroscopic characters of Western Red Cedar are investigated as parameters for numerical simulation. Additionally, the EMPD method is carried out using the program EnergyPlus to simulate moisture buffering performance at varying ventilation rates. Then, the Mold Germination Graph Method is used to evaluate the mold growth risk. The results show that Western Red Cedar can moderate the indoor moisture variation to decrease the mold germination rate. The evaluation results are especially significant in summer (July).
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