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The Cost Effectiveness of Typical Materials in Relation to Indoor Comfort of Passive Cooling Strategies Appropriate for Small One Story House in Chiang Mai, Thailand

This study suggests that the appropriate building materials are those most common in a given locale considering simple appropriate natural passive cooling strategies for a typical small one story house to apply toward traditional living. Two different weather conditions, hot-dry and hot-humid, were selected representing seasonal climates. Computer simulations on thermal effect and ventilation were processed by CFD software, FLOVENT 6.1. Ordinary building materials have been chosen to compare relationship between outdoor-indoor temperature differences and their costs. It was found that natural cross ventilation is the best solution for a small one-story house with additional assistance of thermal mass effect. The most effective typical wall and roof materials are the conventional 10cm brick wall and 5mm corrugated fibrous cement roof which give the best performance for comfort at a unit investment cost. Simulated results also showed that the same house with typical horizontal ceiling presents better comfort than non-ceiling case.