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Sa‘o traditional house in Gurusina, Flores is a house that was designed based on local wisdom, with regard to the concept of tropical architecture. Thermal factors (temperature, humidity, wind speed) and heat gain due to the design and to the building envelope materials are the important factors in determining the level of thermal comfort on a building. The purpose of this study was to determine the relationship among several aspects of the design i.e. the shape, the orientation, and the sheath material against heat gain and thermal comfort of Sa‘o traditional house. The research method was conducted through (1) direct measurement of thermal profile both inside and outside of Sa‘o traditional house, (2) heat gain based on OTTV calculation (overall thermal transfer value), (3) thermal sensation prediction of the occupants by using PMV analysis (predicted mean vote) and PPD (predicted percentage of dissatisfied). The OTTV analysis indicates that heat value inside the house especially at One and Teda One rooms is 25.54 watt/m2 and RTTV is 8,1watt/m2, the value that is recommended by SNI 6389-2011 in that it is less than 35 W/m2 which can be considered as environmentally friendly building. While, the analysis of thermal sensation through the PMV and PPD represents the sensation of comfort level of the occupants in each room of Sa‘o traditional house (Wewa, Piro Sa'o, Lago Sa'o, Kolong, Wewa Teda, Teda One, One). The results show that in the mornings all of the rooms are considered as comfortable, but in the afternoon Teda One and One room are considered as less comfortable due to the lack of wind flows in both rooms. Based on the results of this study, some sets of recommendations will be provided as a reference in improving thermal comfort of Gurusina traditional houses in Flores.
Keywords: Thermal comfort, traditional house of Sa‘o
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