Resumen
Bonfire became the earliest form in shaping space when people gathered around the fire. It was stated by Vitruvius and developed by many theoretician of architecture. Nowadays, the role of fire to the space (architecture) lessened and even disappeared along with technology development. Contrarily, the phenomenon in Tengger showed different result. The presence of hearth (pawon) in Tenggerese house became stronger. It could be seen from the increasing number of hearth there.This research shows, there was a close connection between society structure along with time factor and the number of hearth along with its use in Tenggerese house. The number of hearth in a house could be increased if the number of family members were increased as well. It is possible that the segmentation of hearth space in Tenggerese house could be affected by the influence of the number of family members to the changes of hearth. This possibility would be explored in the research. Interpretive-Historic research method was used in the research to explore the phenomenon found in the field. By exploring field data and historical data, it was finally shown the influence of the changes number in family members to the segmentation of hearth space in Tenggerese house, particularly those related to the marriage and mortality. Space segmentation, especially segmentation of the hearth space in Tengger successfully demonstrated a close link with the change in the numbers of family members.